diff --git a/manifest.json b/manifest.json
index bce1d0b5f..ff4963a7a 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,6 +1,6 @@
 {
     "variables": {
-        "${LATEST}": "3.356.43"
+        "${LATEST}": "3.357.2"
     },
     "endpoints": "https://raw.githubusercontent.com/aws/aws-sdk-php/${LATEST}/src/data/endpoints.json",
     "services": {
diff --git a/src/Core/CHANGELOG.md b/src/Core/CHANGELOG.md
index a6d830927..0bb593b84 100644
--- a/src/Core/CHANGELOG.md
+++ b/src/Core/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Core/composer.json b/src/Core/composer.json
index 660acb56c..a8b5f486e 100644
--- a/src/Core/composer.json
+++ b/src/Core/composer.json
@@ -38,7 +38,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.27-dev"
+            "dev-master": "1.28-dev"
         }
     }
 }
diff --git a/src/Core/src/Sts/StsClient.php b/src/Core/src/Sts/StsClient.php
index 98c1a98aa..92154a40d 100644
--- a/src/Core/src/Sts/StsClient.php
+++ b/src/Core/src/Sts/StsClient.php
@@ -397,6 +397,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'sts',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://sts.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'sts',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -412,13 +420,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'sts',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://sts.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'sts',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/CloudFormation/CHANGELOG.md b/src/Service/CloudFormation/CHANGELOG.md
index 79cc0a8dc..5a13764c6 100644
--- a/src/Service/CloudFormation/CHANGELOG.md
+++ b/src/Service/CloudFormation/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Update endpoint ruleset parameters casing
+- AWS apu-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - AWS enhancement: Documentation updates.
diff --git a/src/Service/CloudFormation/composer.json b/src/Service/CloudFormation/composer.json
index 8b87c12f2..1ecb0b0b2 100644
--- a/src/Service/CloudFormation/composer.json
+++ b/src/Service/CloudFormation/composer.json
@@ -28,7 +28,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.10-dev"
+            "dev-master": "1.11-dev"
         }
     }
 }
diff --git a/src/Service/CloudFormation/src/CloudFormationClient.php b/src/Service/CloudFormation/src/CloudFormationClient.php
index 49ce022c9..fb4ce36c8 100644
--- a/src/Service/CloudFormation/src/CloudFormationClient.php
+++ b/src/Service/CloudFormation/src/CloudFormationClient.php
@@ -169,6 +169,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'cloudformation',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://cloudformation.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'cloudformation',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -184,13 +192,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'cloudformation',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://cloudformation.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'cloudformation',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/CloudWatch/CHANGELOG.md b/src/Service/CloudWatch/CHANGELOG.md
index 62b7b976a..6096aa460 100644
--- a/src/Service/CloudWatch/CHANGELOG.md
+++ b/src/Service/CloudWatch/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/CloudWatch/composer.json b/src/Service/CloudWatch/composer.json
index 6585de9a7..f52572413 100644
--- a/src/Service/CloudWatch/composer.json
+++ b/src/Service/CloudWatch/composer.json
@@ -27,7 +27,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.3-dev"
+            "dev-master": "1.4-dev"
         }
     }
 }
diff --git a/src/Service/CloudWatch/src/CloudWatchClient.php b/src/Service/CloudWatch/src/CloudWatchClient.php
index cf30b7e5a..78fbfe379 100644
--- a/src/Service/CloudWatch/src/CloudWatchClient.php
+++ b/src/Service/CloudWatch/src/CloudWatchClient.php
@@ -382,6 +382,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'monitoring',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://monitoring.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'monitoring',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -397,13 +405,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'monitoring',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://monitoring.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'monitoring',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/CloudWatchLogs/CHANGELOG.md b/src/Service/CloudWatchLogs/CHANGELOG.md
index a44841d4e..d404fe0db 100644
--- a/src/Service/CloudWatchLogs/CHANGELOG.md
+++ b/src/Service/CloudWatchLogs/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - AWS enhancement: Documentation updates.
diff --git a/src/Service/CloudWatchLogs/composer.json b/src/Service/CloudWatchLogs/composer.json
index d7bc9e2fa..64bf8c14c 100644
--- a/src/Service/CloudWatchLogs/composer.json
+++ b/src/Service/CloudWatchLogs/composer.json
@@ -29,7 +29,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.7-dev"
+            "dev-master": "2.8-dev"
         }
     }
 }
diff --git a/src/Service/CloudWatchLogs/src/CloudWatchLogsClient.php b/src/Service/CloudWatchLogs/src/CloudWatchLogsClient.php
index cfaa33a7e..752305bf4 100644
--- a/src/Service/CloudWatchLogs/src/CloudWatchLogsClient.php
+++ b/src/Service/CloudWatchLogs/src/CloudWatchLogsClient.php
@@ -395,6 +395,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'logs',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://logs.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'logs',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -410,13 +418,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'logs',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://logs.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'logs',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/CodeDeploy/CHANGELOG.md b/src/Service/CodeDeploy/CHANGELOG.md
index 5f71c2012..6a3cd2ba7 100644
--- a/src/Service/CodeDeploy/CHANGELOG.md
+++ b/src/Service/CodeDeploy/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/CodeDeploy/composer.json b/src/Service/CodeDeploy/composer.json
index da5c8adff..c96512129 100644
--- a/src/Service/CodeDeploy/composer.json
+++ b/src/Service/CodeDeploy/composer.json
@@ -28,7 +28,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.3-dev"
+            "dev-master": "2.4-dev"
         }
     }
 }
diff --git a/src/Service/CodeDeploy/src/CodeDeployClient.php b/src/Service/CodeDeploy/src/CodeDeployClient.php
index 225f8bbcc..77949e4c0 100644
--- a/src/Service/CodeDeploy/src/CodeDeployClient.php
+++ b/src/Service/CodeDeploy/src/CodeDeployClient.php
@@ -284,6 +284,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'codedeploy',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://codedeploy.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'codedeploy',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -299,13 +307,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'codedeploy',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://codedeploy.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'codedeploy',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/DynamoDb/CHANGELOG.md b/src/Service/DynamoDb/CHANGELOG.md
index 0f78ceb5c..c9cafe2a6 100644
--- a/src/Service/DynamoDb/CHANGELOG.md
+++ b/src/Service/DynamoDb/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/DynamoDb/composer.json b/src/Service/DynamoDb/composer.json
index 43a2b4799..b598d7659 100644
--- a/src/Service/DynamoDb/composer.json
+++ b/src/Service/DynamoDb/composer.json
@@ -32,7 +32,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "3.8-dev"
+            "dev-master": "3.9-dev"
         }
     }
 }
diff --git a/src/Service/DynamoDb/src/DynamoDbClient.php b/src/Service/DynamoDb/src/DynamoDbClient.php
index 7e1ffa674..8726fb54c 100644
--- a/src/Service/DynamoDb/src/DynamoDbClient.php
+++ b/src/Service/DynamoDb/src/DynamoDbClient.php
@@ -1202,6 +1202,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'dynamodb',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://dynamodb.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'dynamodb',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -1217,13 +1225,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'dynamodb',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://dynamodb.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'dynamodb',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/Ecr/CHANGELOG.md b/src/Service/Ecr/CHANGELOG.md
index e69bc9239..9c11f93f2 100644
--- a/src/Service/Ecr/CHANGELOG.md
+++ b/src/Service/Ecr/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Update endpoint ruleset parameters casing
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/Ecr/composer.json b/src/Service/Ecr/composer.json
index 07bda4bc7..f07e5421b 100644
--- a/src/Service/Ecr/composer.json
+++ b/src/Service/Ecr/composer.json
@@ -29,7 +29,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.11-dev"
+            "dev-master": "1.12-dev"
         }
     }
 }
diff --git a/src/Service/Ecr/src/EcrClient.php b/src/Service/Ecr/src/EcrClient.php
index 8e303525f..b6e86b6d5 100644
--- a/src/Service/Ecr/src/EcrClient.php
+++ b/src/Service/Ecr/src/EcrClient.php
@@ -165,6 +165,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'ecr',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://api.ecr.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'ecr',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -180,13 +188,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'ecr',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://api.ecr.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'ecr',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/ElastiCache/CHANGELOG.md b/src/Service/ElastiCache/CHANGELOG.md
index a50a4974e..16e57d733 100644
--- a/src/Service/ElastiCache/CHANGELOG.md
+++ b/src/Service/ElastiCache/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/ElastiCache/composer.json b/src/Service/ElastiCache/composer.json
index a4206e17c..1a8d7dd9b 100644
--- a/src/Service/ElastiCache/composer.json
+++ b/src/Service/ElastiCache/composer.json
@@ -28,7 +28,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.4-dev"
+            "dev-master": "1.5-dev"
         }
     }
 }
diff --git a/src/Service/ElastiCache/src/ElastiCacheClient.php b/src/Service/ElastiCache/src/ElastiCacheClient.php
index 50f41806b..29144e920 100644
--- a/src/Service/ElastiCache/src/ElastiCacheClient.php
+++ b/src/Service/ElastiCache/src/ElastiCacheClient.php
@@ -127,6 +127,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'elasticache',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://elasticache.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'elasticache',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -142,13 +150,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'elasticache',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://elasticache.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'elasticache',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/EventBridge/CHANGELOG.md b/src/Service/EventBridge/CHANGELOG.md
index 3c5b122e4..cacb0e3d4 100644
--- a/src/Service/EventBridge/CHANGELOG.md
+++ b/src/Service/EventBridge/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/EventBridge/composer.json b/src/Service/EventBridge/composer.json
index deb2b4f6c..b391e2c21 100644
--- a/src/Service/EventBridge/composer.json
+++ b/src/Service/EventBridge/composer.json
@@ -27,7 +27,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.9-dev"
+            "dev-master": "1.10-dev"
         }
     }
 }
diff --git a/src/Service/EventBridge/src/EventBridgeClient.php b/src/Service/EventBridge/src/EventBridgeClient.php
index 46ab8e2c1..9928bca0c 100644
--- a/src/Service/EventBridge/src/EventBridgeClient.php
+++ b/src/Service/EventBridge/src/EventBridgeClient.php
@@ -119,6 +119,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'events',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://events.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'events',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -134,13 +142,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'events',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://events.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'events',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/Iam/CHANGELOG.md b/src/Service/Iam/CHANGELOG.md
index a7ae21662..b5163c95d 100644
--- a/src/Service/Iam/CHANGELOG.md
+++ b/src/Service/Iam/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/Iam/composer.json b/src/Service/Iam/composer.json
index 30264004d..49e9e87ef 100644
--- a/src/Service/Iam/composer.json
+++ b/src/Service/Iam/composer.json
@@ -31,7 +31,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.7-dev"
+            "dev-master": "1.8-dev"
         }
     }
 }
diff --git a/src/Service/Iam/src/IamClient.php b/src/Service/Iam/src/IamClient.php
index 4e0a796fa..71629d561 100644
--- a/src/Service/Iam/src/IamClient.php
+++ b/src/Service/Iam/src/IamClient.php
@@ -601,18 +601,19 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'iam',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isof-east-1':
-            case 'us-isof-south-1':
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
                 return [
-                    'endpoint' => 'https://iam.us-isof-south-1.csp.hci.ic.gov',
-                    'signRegion' => 'us-isof-south-1',
+                    'endpoint' => 'https://iam.us-isob-east-1.sc2s.sgov.gov',
+                    'signRegion' => 'us-isob-east-1',
                     'signService' => 'iam',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
+            case 'us-isof-east-1':
+            case 'us-isof-south-1':
                 return [
-                    'endpoint' => 'https://iam.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
+                    'endpoint' => 'https://iam.us-isof-south-1.csp.hci.ic.gov',
+                    'signRegion' => 'us-isof-south-1',
                     'signService' => 'iam',
                     'signVersions' => ['v4'],
                 ];
diff --git a/src/Service/Kinesis/CHANGELOG.md b/src/Service/Kinesis/CHANGELOG.md
index 2bba40bb0..fd6c776f8 100644
--- a/src/Service/Kinesis/CHANGELOG.md
+++ b/src/Service/Kinesis/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/Kinesis/composer.json b/src/Service/Kinesis/composer.json
index 55bbeffb2..6cd2a48ad 100644
--- a/src/Service/Kinesis/composer.json
+++ b/src/Service/Kinesis/composer.json
@@ -28,7 +28,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "3.3-dev"
+            "dev-master": "3.4-dev"
         }
     }
 }
diff --git a/src/Service/Kinesis/src/KinesisClient.php b/src/Service/Kinesis/src/KinesisClient.php
index a9372c5b0..2a82feffd 100644
--- a/src/Service/Kinesis/src/KinesisClient.php
+++ b/src/Service/Kinesis/src/KinesisClient.php
@@ -1641,6 +1641,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'kinesis',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://kinesis.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'kinesis',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -1656,13 +1664,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'kinesis',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://kinesis.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'kinesis',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/Kms/CHANGELOG.md b/src/Service/Kms/CHANGELOG.md
index c6c05d959..404e9a87b 100644
--- a/src/Service/Kms/CHANGELOG.md
+++ b/src/Service/Kms/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - AWS enhancement: Documentation updates.
diff --git a/src/Service/Kms/composer.json b/src/Service/Kms/composer.json
index c7227df40..ba2c3e21d 100644
--- a/src/Service/Kms/composer.json
+++ b/src/Service/Kms/composer.json
@@ -28,7 +28,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.10-dev"
+            "dev-master": "1.11-dev"
         }
     }
 }
diff --git a/src/Service/Kms/src/KmsClient.php b/src/Service/Kms/src/KmsClient.php
index 651c01f05..cdd81bad6 100644
--- a/src/Service/Kms/src/KmsClient.php
+++ b/src/Service/Kms/src/KmsClient.php
@@ -1327,6 +1327,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'kms',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://kms.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'kms',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -1342,13 +1350,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'kms',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://kms.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'kms',
-                    'signVersions' => ['v4'],
-                ];
             case 'eu-isoe-west-1-fips':
                 return [
                     'endpoint' => 'https://kms-fips.eu-isoe-west-1.cloud.adc-e.uk',
diff --git a/src/Service/Lambda/CHANGELOG.md b/src/Service/Lambda/CHANGELOG.md
index 46e1b6167..81901dfbc 100644
--- a/src/Service/Lambda/CHANGELOG.md
+++ b/src/Service/Lambda/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Add NodeJs 24 (nodejs24.x) support to AWS Lambda.
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/Lambda/composer.json b/src/Service/Lambda/composer.json
index 47178a7a3..9183ad139 100644
--- a/src/Service/Lambda/composer.json
+++ b/src/Service/Lambda/composer.json
@@ -28,7 +28,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.12-dev"
+            "dev-master": "2.13-dev"
         }
     }
 }
diff --git a/src/Service/Lambda/src/Enum/Runtime.php b/src/Service/Lambda/src/Enum/Runtime.php
index b48bc3812..7cda0f461 100644
--- a/src/Service/Lambda/src/Enum/Runtime.php
+++ b/src/Service/Lambda/src/Enum/Runtime.php
@@ -24,6 +24,7 @@ final class Runtime
     public const NODEJS_18_X = 'nodejs18.x';
     public const NODEJS_20_X = 'nodejs20.x';
     public const NODEJS_22_X = 'nodejs22.x';
+    public const NODEJS_24_X = 'nodejs24.x';
     public const NODEJS_4_3 = 'nodejs4.3';
     public const NODEJS_4_3_EDGE = 'nodejs4.3-edge';
     public const NODEJS_6_10 = 'nodejs6.10';
@@ -69,6 +70,7 @@ public static function exists(string $value): bool
             self::NODEJS_18_X => true,
             self::NODEJS_20_X => true,
             self::NODEJS_22_X => true,
+            self::NODEJS_24_X => true,
             self::NODEJS_4_3 => true,
             self::NODEJS_4_3_EDGE => true,
             self::NODEJS_6_10 => true,
diff --git a/src/Service/Lambda/src/LambdaClient.php b/src/Service/Lambda/src/LambdaClient.php
index 8972cad3f..0aef3885e 100644
--- a/src/Service/Lambda/src/LambdaClient.php
+++ b/src/Service/Lambda/src/LambdaClient.php
@@ -612,6 +612,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'lambda',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://lambda.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'lambda',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -627,13 +635,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'lambda',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://lambda.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'lambda',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/LocationService/CHANGELOG.md b/src/Service/LocationService/CHANGELOG.md
index 3d0661cc9..e67291558 100644
--- a/src/Service/LocationService/CHANGELOG.md
+++ b/src/Service/LocationService/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
+- AWS enhancement: Documentation updates.
 
 ## 1.1.2
 
diff --git a/src/Service/LocationService/src/LocationServiceClient.php b/src/Service/LocationService/src/LocationServiceClient.php
index f296c8afc..b29c319d0 100644
--- a/src/Service/LocationService/src/LocationServiceClient.php
+++ b/src/Service/LocationService/src/LocationServiceClient.php
@@ -29,31 +29,46 @@
 class LocationServiceClient extends AbstractApi
 {
     /**
-     * Calculates a route [^1] given the following required parameters: `DeparturePosition` and `DestinationPosition`.
-     * Requires that you first create a route calculator resource [^2].
+     * ! This operation is no longer current and may be deprecated in the future. We recommend you upgrade to
+     * ! `CalculateRoutes` [^1] or `CalculateIsolines` [^2] unless you require Grab data.
+     * !
+     * ! - `CalculateRoute` is part of a previous Amazon Location Service Routes API (version 1) which has been superseded
+     * !   by a more intuitive, powerful, and complete API (version 2).
+     * ! - The version 2 `CalculateRoutes` operation gives better results for point-to-point routing, while the version 2
+     * !   `CalculateIsolines` operation adds support for calculating service areas and travel time envelopes.
+     * ! - If you are using an Amazon Web Services SDK or the Amazon Web Services CLI, note that the Routes API version 2 is
+     * !   found under `geo-routes` or `geo_routes`, not under `location`.
+     * ! - Since Grab is not yet fully supported in Routes API version 2, we recommend you continue using API version 1 when
+     * !   using Grab.
+     * !
+     *
+     * Calculates a route [^3] given the following required parameters: `DeparturePosition` and `DestinationPosition`.
+     * Requires that you first create a route calculator resource [^4].
      *
      * By default, a request that doesn't specify a departure time uses the best time of day to travel with the best traffic
      * conditions when calculating the route.
      *
      * Additional options include:
      *
-     * - Specifying a departure time [^3] using either `DepartureTime` or `DepartNow`. This calculates a route based on
+     * - Specifying a departure time [^5] using either `DepartureTime` or `DepartNow`. This calculates a route based on
      *   predictive traffic data at the given time.
      *
      *   > You can't specify both `DepartureTime` and `DepartNow` in a single request. Specifying both parameters returns a
      *   > validation error.
      *
-     * - Specifying a travel mode [^4] using TravelMode sets the transportation mode used to calculate the routes. This also
+     * - Specifying a travel mode [^6] using TravelMode sets the transportation mode used to calculate the routes. This also
      *   lets you specify additional route preferences in `CarModeOptions` if traveling by `Car`, or `TruckModeOptions` if
      *   traveling by `Truck`.
      *
      *   > If you specify `walking` for the travel mode and your data provider is Esri, the start and destination must be
      *   > within 40km.
      *
-     * [^1]: https://docs.aws.amazon.com/location/previous/developerguide/calculate-route.html
-     * [^2]: https://docs.aws.amazon.com/location-routes/latest/APIReference/API_CreateRouteCalculator.html
-     * [^3]: https://docs.aws.amazon.com/location/previous/developerguide/departure-time.html
-     * [^4]: https://docs.aws.amazon.com/location/previous/developerguide/travel-mode.html
+     * [^1]: /location/latest/APIReference/API_CalculateRoutes.html
+     * [^2]: /location/latest/APIReference/API_CalculateIsolines.html
+     * [^3]: https://docs.aws.amazon.com/location/previous/developerguide/calculate-route.html
+     * [^4]: https://docs.aws.amazon.com/location-routes/latest/APIReference/API_CreateRouteCalculator.html
+     * [^5]: https://docs.aws.amazon.com/location/previous/developerguide/departure-time.html
+     * [^6]: https://docs.aws.amazon.com/location/previous/developerguide/travel-mode.html
      *
      * @see https://docs.aws.amazon.com/location/latest/APIReference/API_CalculateRoute.html
      * @see https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-geo-2020-11-19.html#calculateroute
@@ -97,7 +112,20 @@ public function calculateRoute($input): CalculateRouteResponse
     }
 
     /**
-     * Calculates a route matrix [^1] given the following required parameters: `DeparturePositions` and
+     * ! This operation is no longer current and may be deprecated in the future. We recommend you upgrade to the V2
+     * ! `CalculateRouteMatrix` [^1] unless you require Grab data.
+     * !
+     * ! - This version of `CalculateRouteMatrix` is part of a previous Amazon Location Service Routes API (version 1) which
+     * !   has been superseded by a more intuitive, powerful, and complete API (version 2).
+     * ! - The version 2 `CalculateRouteMatrix` operation gives better results for matrix routing calculations.
+     * ! - If you are using an Amazon Web Services SDK or the Amazon Web Services CLI, note that the Routes API version 2 is
+     * !   found under `geo-routes` or `geo_routes`, not under `location`.
+     * ! - Since Grab is not yet fully supported in Routes API version 2, we recommend you continue using API version 1 when
+     * !   using Grab.
+     * ! - Start your version 2 API journey with the Routes V2 API Reference [^2] or the Developer Guide [^3].
+     * !
+     *
+     * Calculates a route matrix [^4] given the following required parameters: `DeparturePositions` and
      * `DestinationPositions`. `CalculateRouteMatrix` calculates routes and returns the travel time and travel distance from
      * each departure position to each destination position in the request. For example, given departure positions A and B,
      * and destination positions X and Y, `CalculateRouteMatrix` will return time and distance for routes from A to X, A to
@@ -106,27 +134,30 @@ public function calculateRoute($input): CalculateRouteResponse
      *
      * > Your account is charged for each route calculated, not the number of requests.
      *
-     * Requires that you first create a route calculator resource [^2].
+     * Requires that you first create a route calculator resource [^5].
      *
      * By default, a request that doesn't specify a departure time uses the best time of day to travel with the best traffic
      * conditions when calculating routes.
      *
      * Additional options include:
      *
-     * - Specifying a departure time [^3] using either `DepartureTime` or `DepartNow`. This calculates routes based on
+     * - Specifying a departure time [^6] using either `DepartureTime` or `DepartNow`. This calculates routes based on
      *   predictive traffic data at the given time.
      *
      *   > You can't specify both `DepartureTime` and `DepartNow` in a single request. Specifying both parameters returns a
      *   > validation error.
      *
-     * - Specifying a travel mode [^4] using TravelMode sets the transportation mode used to calculate the routes. This also
+     * - Specifying a travel mode [^7] using TravelMode sets the transportation mode used to calculate the routes. This also
      *   lets you specify additional route preferences in `CarModeOptions` if traveling by `Car`, or `TruckModeOptions` if
      *   traveling by `Truck`.
      *
-     * [^1]: https://docs.aws.amazon.com/location/previous/developerguide/calculate-route-matrix.html
-     * [^2]: https://docs.aws.amazon.com/location-routes/latest/APIReference/API_CreateRouteCalculator.html
-     * [^3]: https://docs.aws.amazon.com/location/previous/developerguide/departure-time.html
-     * [^4]: https://docs.aws.amazon.com/location/previous/developerguide/travel-mode.html
+     * [^1]: /location/latest/APIReference/API_CalculateRouteMatrix.html
+     * [^2]: /location/latest/APIReference/API_Operations_Amazon_Location_Service_Routes_V2.html
+     * [^3]: /location/latest/developerguide/routes.html
+     * [^4]: https://docs.aws.amazon.com/location/previous/developerguide/calculate-route-matrix.html
+     * [^5]: https://docs.aws.amazon.com/location-routes/latest/APIReference/API_CreateRouteCalculator.html
+     * [^6]: https://docs.aws.amazon.com/location/previous/developerguide/departure-time.html
+     * [^7]: https://docs.aws.amazon.com/location/previous/developerguide/travel-mode.html
      *
      * @see https://docs.aws.amazon.com/location/latest/APIReference/API_CalculateRouteMatrix.html
      * @see https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-geo-2020-11-19.html#calculateroutematrix
@@ -166,9 +197,26 @@ public function calculateRouteMatrix($input): CalculateRouteMatrixResponse
     }
 
     /**
+     * ! This operation is no longer current and may be deprecated in the future. We recommend you upgrade to
+     * ! `ReverseGeocode` [^1] or `SearchNearby` [^2] unless you require Grab data.
+     * !
+     * ! - `SearchPlaceIndexForPosition` is part of a previous Amazon Location Service Places API (version 1) which has been
+     * !   superseded by a more intuitive, powerful, and complete API (version 2).
+     * ! - The version 2 `ReverseGeocode` operation gives better results in the address reverse-geocoding use case, while
+     * !   the version 2 `SearchNearby` operation gives better results when searching for businesses and points of interest
+     * !   near a specific location.
+     * ! - If you are using an Amazon Web Services SDK or the Amazon Web Services CLI, note that the Places API version 2 is
+     * !   found under `geo-places` or `geo_places`, not under `location`.
+     * ! - Since Grab is not yet fully supported in Places API version 2, we recommend you continue using API version 1 when
+     * !   using Grab.
+     * !
+     *
      * Reverse geocodes a given coordinate and returns a legible address. Allows you to search for Places or points of
      * interest near a given position.
      *
+     * [^1]: /location/latest/APIReference/API_geoplaces_ReverseGeocode.html
+     * [^2]: /location/latest/APIReference/API_geoplaces_SearchNearby.html
+     *
      * @see https://docs.aws.amazon.com/location/latest/APIReference/API_SearchPlaceIndexForPosition.html
      * @see https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-geo-2020-11-19.html#searchplaceindexforposition
      *
@@ -202,6 +250,19 @@ public function searchPlaceIndexForPosition($input): SearchPlaceIndexForPosition
     }
 
     /**
+     * ! This operation is no longer current and may be deprecated in the future. We recommend you upgrade to `Geocode` [^1]
+     * ! or `SearchText` [^2] unless you require Grab data.
+     * !
+     * ! - `SearchPlaceIndexForText` is part of a previous Amazon Location Service Places API (version 1) which has been
+     * !   superseded by a more intuitive, powerful, and complete API (version 2).
+     * ! - The version 2 `Geocode` operation gives better results in the address geocoding use case, while the version 2
+     * !   `SearchText` operation gives better results when searching for businesses and points of interest.
+     * ! - If you are using an Amazon Web Services SDK or the Amazon Web Services CLI, note that the Places API version 2 is
+     * !   found under `geo-places` or `geo_places`, not under `location`.
+     * ! - Since Grab is not yet fully supported in Places API version 2, we recommend you continue using API version 1 when
+     * !   using Grab.
+     * !
+     *
      * Geocodes free-form text, such as an address, name, city, or region to allow you to search for Places or points of
      * interest.
      *
@@ -213,6 +274,9 @@ public function searchPlaceIndexForPosition($input): SearchPlaceIndexForPosition
      *
      * Search results are returned in order of highest to lowest relevance.
      *
+     * [^1]: /location/latest/APIReference/API_geoplaces_Geocode.html
+     * [^2]: /location/latest/APIReference/API_geoplaces_SearchText.html
+     *
      * @see https://docs.aws.amazon.com/location/latest/APIReference/API_SearchPlaceIndexForText.html
      * @see https://docs.aws.amazon.com/aws-sdk-php/v3/api/api-geo-2020-11-19.html#searchplaceindexfortext
      *
diff --git a/src/Service/Route53/CHANGELOG.md b/src/Service/Route53/CHANGELOG.md
index d61d41ec2..887939b77 100644
--- a/src/Service/Route53/CHANGELOG.md
+++ b/src/Service/Route53/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Amazon Route 53 now supports the ISOB West Region for private DNS for Amazon VPCs and cloudwatch healthchecks.
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/Route53/composer.json b/src/Service/Route53/composer.json
index 19ec095ec..46207f8f2 100644
--- a/src/Service/Route53/composer.json
+++ b/src/Service/Route53/composer.json
@@ -29,7 +29,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.11-dev"
+            "dev-master": "2.12-dev"
         }
     }
 }
diff --git a/src/Service/Route53/src/Enum/VPCRegion.php b/src/Service/Route53/src/Enum/VPCRegion.php
index 979e62d19..be8faa574 100644
--- a/src/Service/Route53/src/Enum/VPCRegion.php
+++ b/src/Service/Route53/src/Enum/VPCRegion.php
@@ -42,6 +42,7 @@ final class VPCRegion
     public const US_GOV_EAST_1 = 'us-gov-east-1';
     public const US_GOV_WEST_1 = 'us-gov-west-1';
     public const US_ISOB_EAST_1 = 'us-isob-east-1';
+    public const US_ISOB_WEST_1 = 'us-isob-west-1';
     public const US_ISOF_EAST_1 = 'us-isof-east-1';
     public const US_ISOF_SOUTH_1 = 'us-isof-south-1';
     public const US_ISO_EAST_1 = 'us-iso-east-1';
@@ -90,6 +91,7 @@ public static function exists(string $value): bool
             self::US_GOV_EAST_1 => true,
             self::US_GOV_WEST_1 => true,
             self::US_ISOB_EAST_1 => true,
+            self::US_ISOB_WEST_1 => true,
             self::US_ISOF_EAST_1 => true,
             self::US_ISOF_SOUTH_1 => true,
             self::US_ISO_EAST_1 => true,
diff --git a/src/Service/Route53/src/Route53Client.php b/src/Service/Route53/src/Route53Client.php
index f31be3b9c..63760fd76 100644
--- a/src/Service/Route53/src/Route53Client.php
+++ b/src/Service/Route53/src/Route53Client.php
@@ -253,11 +253,10 @@ public function createHostedZone($input): CreateHostedZoneResponse
      * method provided by the registrar to update name servers for the domain registration. For more information, perform an
      * internet search on "free DNS service."
      *
-     * You can delete a hosted zone only if it contains only the default SOA record and NS resource record sets. If the
-     * hosted zone contains other resource record sets, you must delete them before you can delete the hosted zone. If you
-     * try to delete a hosted zone that contains other resource record sets, the request fails, and Route 53 returns a
-     * `HostedZoneNotEmpty` error. For information about deleting records from your hosted zone, see
-     * ChangeResourceRecordSets [^3].
+     * You can delete a hosted zone only if it contains only the default SOA and NS records and has DNSSEC signing disabled.
+     * If the hosted zone contains other records or has DNSSEC enabled, you must delete the records and disable DNSSEC
+     * before deletion. Attempting to delete a hosted zone with additional records or DNSSEC enabled returns a
+     * `HostedZoneNotEmpty` error. For information about deleting records, see ChangeResourceRecordSets [^3].
      *
      * To verify that the hosted zone has been deleted, do one of the following:
      *
@@ -547,6 +546,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'route53',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => 'https://route53.sc2s.sgov.gov',
+                    'signRegion' => 'us-isob-east-1',
+                    'signService' => 'route53',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -562,13 +569,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'route53',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://route53.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'route53',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/Route53/src/ValueObject/AliasTarget.php b/src/Service/Route53/src/ValueObject/AliasTarget.php
index f53b399ee..f6cddeeca 100644
--- a/src/Service/Route53/src/ValueObject/AliasTarget.php
+++ b/src/Service/Route53/src/ValueObject/AliasTarget.php
@@ -258,22 +258,42 @@ final class AliasTarget
      *   > Route 53 health checks, but they perform a similar function. Do not create Route 53 health checks for the EC2
      *   > instances that you register with an ELB load balancer.
      *
+     * - `API Gateway APIs`:
+     *
+     *   There are no special requirements for setting `EvaluateTargetHealth` to `true` when the alias target is an API
+     *   Gateway API. However, because API Gateway is highly available by design, `EvaluateTargetHealth` provides no
+     *   operational benefit and Route 53 health checks [^1] are recommended instead for failover scenarios.
      * - `S3 buckets`:
      *
      *   There are no special requirements for setting `EvaluateTargetHealth` to `true` when the alias target is an S3
-     *   bucket.
+     *   bucket. However, because S3 buckets are highly available by design, `EvaluateTargetHealth` provides no operational
+     *   benefit and Route 53 health checks [^2] are recommended instead for failover scenarios.
+     * - `VPC interface endpoints`:
+     *
+     *   There are no special requirements for setting `EvaluateTargetHealth` to `true` when the alias target is a VPC
+     *   interface endpoint. However, because VPC interface endpoints are highly available by design, `EvaluateTargetHealth`
+     *   provides no operational benefit and Route 53 health checks [^3] are recommended instead for failover scenarios.
      * - `Other records in the same hosted zone`:
      *
      *   If the Amazon Web Services resource that you specify in `DNSName` is a record or a group of records (for example, a
      *   group of weighted records) but is not another alias record, we recommend that you associate a health check with all
-     *   of the records in the alias target. For more information, see What Happens When You Omit Health Checks? [^1] in the
+     *   of the records in the alias target. For more information, see What Happens When You Omit Health Checks? [^4] in the
      *   *Amazon Route 53 Developer Guide*.
      *
-     * For more information and examples, see Amazon Route 53 Health Checks and DNS Failover [^2] in the *Amazon Route 53
+     * > While `EvaluateTargetHealth` can be set to `true` for highly available Amazon Web Services services (such as S3
+     * > buckets, VPC interface endpoints, and API Gateway), these services are designed for high availability and rarely
+     * > experience outages that would be detected by this feature. For failover scenarios with these services, consider
+     * > using Route 53 health checks [^5] that monitor your application's ability to access the service instead.
+     *
+     * For more information and examples, see Amazon Route 53 Health Checks and DNS Failover [^6] in the *Amazon Route 53
      * Developer Guide*.
      *
-     * [^1]: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover-complex-configs.html#dns-failover-complex-configs-hc-omitting
+     * [^1]: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover.html
      * [^2]: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover.html
+     * [^3]: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover.html
+     * [^4]: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover-complex-configs.html#dns-failover-complex-configs-hc-omitting
+     * [^5]: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover.html
+     * [^6]: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover.html
      *
      * @var bool
      */
diff --git a/src/Service/S3/CHANGELOG.md b/src/Service/S3/CHANGELOG.md
index 782ed81ea..40181d06e 100644
--- a/src/Service/S3/CHANGELOG.md
+++ b/src/Service/S3/CHANGELOG.md
@@ -6,6 +6,10 @@
 
 - AWS api-change: Expires's property and its getters/setters switched from `\DateTimeImmutable` to `string`.
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/S3/src/S3Client.php b/src/Service/S3/src/S3Client.php
index 7b4e1154f..40aad69c8 100644
--- a/src/Service/S3/src/S3Client.php
+++ b/src/Service/S3/src/S3Client.php
@@ -3357,6 +3357,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 's3',
                     'signVersions' => ['s3v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://s3.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 's3',
+                    'signVersions' => ['s3v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -3372,13 +3380,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 's3',
                     'signVersions' => ['s3v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://s3.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 's3',
-                    'signVersions' => ['s3v4'],
-                ];
             case 'fips-us-iso-east-1':
                 return [
                     'endpoint' => 'https://s3-fips.us-iso-east-1.c2s.ic.gov',
diff --git a/src/Service/SecretsManager/CHANGELOG.md b/src/Service/SecretsManager/CHANGELOG.md
index 864d2b9d3..e1f2612d9 100644
--- a/src/Service/SecretsManager/CHANGELOG.md
+++ b/src/Service/SecretsManager/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/SecretsManager/composer.json b/src/Service/SecretsManager/composer.json
index 3cdfe435e..be5fba823 100644
--- a/src/Service/SecretsManager/composer.json
+++ b/src/Service/SecretsManager/composer.json
@@ -29,7 +29,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.9-dev"
+            "dev-master": "2.10-dev"
         }
     }
 }
diff --git a/src/Service/SecretsManager/src/SecretsManagerClient.php b/src/Service/SecretsManager/src/SecretsManagerClient.php
index 91975d86c..af1d3df7b 100644
--- a/src/Service/SecretsManager/src/SecretsManagerClient.php
+++ b/src/Service/SecretsManager/src/SecretsManagerClient.php
@@ -509,6 +509,7 @@ protected function getEndpointMetadata(?string $region): array
                 ];
             case 'us-isob-east-1':
             case 'us-isob-east-1-fips':
+            case 'us-isob-west-1':
                 return [
                     'endpoint' => "https://secretsmanager.$region.sc2s.sgov.gov",
                     'signRegion' => $region,
diff --git a/src/Service/Sns/CHANGELOG.md b/src/Service/Sns/CHANGELOG.md
index 531d73a19..16055246f 100644
--- a/src/Service/Sns/CHANGELOG.md
+++ b/src/Service/Sns/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Update endpoint ruleset parameters casing
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/Sns/composer.json b/src/Service/Sns/composer.json
index d764c4594..55d7058f1 100644
--- a/src/Service/Sns/composer.json
+++ b/src/Service/Sns/composer.json
@@ -28,7 +28,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.11-dev"
+            "dev-master": "1.12-dev"
         }
     }
 }
diff --git a/src/Service/Sns/src/SnsClient.php b/src/Service/Sns/src/SnsClient.php
index b755b0a10..efe5c9eb2 100644
--- a/src/Service/Sns/src/SnsClient.php
+++ b/src/Service/Sns/src/SnsClient.php
@@ -616,6 +616,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'sns',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://sns.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'sns',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -631,13 +639,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'sns',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://sns.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'sns',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/Sqs/CHANGELOG.md b/src/Service/Sqs/CHANGELOG.md
index 2d1e6d709..8e558b4e0 100644
--- a/src/Service/Sqs/CHANGELOG.md
+++ b/src/Service/Sqs/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - AWS enhancement: Documentation updates.
diff --git a/src/Service/Sqs/composer.json b/src/Service/Sqs/composer.json
index 05bfcfea3..ebddb9cfb 100644
--- a/src/Service/Sqs/composer.json
+++ b/src/Service/Sqs/composer.json
@@ -28,7 +28,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.7-dev"
+            "dev-master": "2.8-dev"
         }
     }
 }
diff --git a/src/Service/Sqs/src/SqsClient.php b/src/Service/Sqs/src/SqsClient.php
index e39aacfa0..73b84fc49 100644
--- a/src/Service/Sqs/src/SqsClient.php
+++ b/src/Service/Sqs/src/SqsClient.php
@@ -959,6 +959,13 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'sqs',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => 'https://sqs.us-isob-west-1.sc2s.sgov.gov',
+                    'signRegion' => 'us-isob-west-1',
+                    'signService' => 'sqs',
+                    'signVersions' => ['v4'],
+                ];
             case 'fips-us-iso-east-1':
             case 'us-iso-east-1':
                 return [
diff --git a/src/Service/Ssm/CHANGELOG.md b/src/Service/Ssm/CHANGELOG.md
index 6e06c930e..86401fa16 100644
--- a/src/Service/Ssm/CHANGELOG.md
+++ b/src/Service/Ssm/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/Ssm/composer.json b/src/Service/Ssm/composer.json
index 2afecc5e3..fef13163d 100644
--- a/src/Service/Ssm/composer.json
+++ b/src/Service/Ssm/composer.json
@@ -30,7 +30,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.3-dev"
+            "dev-master": "2.4-dev"
         }
     }
 }
diff --git a/src/Service/Ssm/src/SsmClient.php b/src/Service/Ssm/src/SsmClient.php
index 087927175..76a759d7f 100644
--- a/src/Service/Ssm/src/SsmClient.php
+++ b/src/Service/Ssm/src/SsmClient.php
@@ -359,6 +359,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'ssm',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://ssm.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'ssm',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -374,13 +382,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'ssm',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://ssm.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'ssm',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [
diff --git a/src/Service/StepFunctions/CHANGELOG.md b/src/Service/StepFunctions/CHANGELOG.md
index 00e53b4d1..619df0b08 100644
--- a/src/Service/StepFunctions/CHANGELOG.md
+++ b/src/Service/StepFunctions/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/StepFunctions/composer.json b/src/Service/StepFunctions/composer.json
index 391925a62..daa83a73b 100644
--- a/src/Service/StepFunctions/composer.json
+++ b/src/Service/StepFunctions/composer.json
@@ -27,7 +27,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.6-dev"
+            "dev-master": "1.7-dev"
         }
     }
 }
diff --git a/src/Service/StepFunctions/src/StepFunctionsClient.php b/src/Service/StepFunctions/src/StepFunctionsClient.php
index 5631321da..8cd7fe7cf 100644
--- a/src/Service/StepFunctions/src/StepFunctionsClient.php
+++ b/src/Service/StepFunctions/src/StepFunctionsClient.php
@@ -375,6 +375,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'states',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://states.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'states',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -390,13 +398,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'states',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://states.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'states',
-                    'signVersions' => ['v4'],
-                ];
             case 'fips-us-iso-east-1':
                 return [
                     'endpoint' => 'https://states-fips.us-iso-east-1.c2s.ic.gov',
diff --git a/src/Service/XRay/CHANGELOG.md b/src/Service/XRay/CHANGELOG.md
index 6207fec92..a8fb13ce7 100644
--- a/src/Service/XRay/CHANGELOG.md
+++ b/src/Service/XRay/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## NOT RELEASED
 
+### Added
+
+- AWS api-change: Added `us-isob-west-1` region
+
 ### Changed
 
 - Apply new CodingStandard from latest php-cs-fixer.
diff --git a/src/Service/XRay/composer.json b/src/Service/XRay/composer.json
index 87a73aa8c..18e3ac430 100644
--- a/src/Service/XRay/composer.json
+++ b/src/Service/XRay/composer.json
@@ -27,7 +27,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.4-dev"
+            "dev-master": "1.5-dev"
         }
     }
 }
diff --git a/src/Service/XRay/src/XRayClient.php b/src/Service/XRay/src/XRayClient.php
index 8c4be3704..943bb85d9 100644
--- a/src/Service/XRay/src/XRayClient.php
+++ b/src/Service/XRay/src/XRayClient.php
@@ -147,6 +147,14 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'xray',
                     'signVersions' => ['v4'],
                 ];
+            case 'us-isob-east-1':
+            case 'us-isob-west-1':
+                return [
+                    'endpoint' => "https://xray.$region.sc2s.sgov.gov",
+                    'signRegion' => $region,
+                    'signService' => 'xray',
+                    'signVersions' => ['v4'],
+                ];
             case 'us-isof-east-1':
             case 'us-isof-south-1':
                 return [
@@ -162,13 +170,6 @@ protected function getEndpointMetadata(?string $region): array
                     'signService' => 'xray',
                     'signVersions' => ['v4'],
                 ];
-            case 'us-isob-east-1':
-                return [
-                    'endpoint' => 'https://xray.us-isob-east-1.sc2s.sgov.gov',
-                    'signRegion' => 'us-isob-east-1',
-                    'signService' => 'xray',
-                    'signVersions' => ['v4'],
-                ];
         }
 
         return [