diff --git a/data/local.yaml b/data/local.yaml
index 41f344b..63a5885 100644
--- a/data/local.yaml
+++ b/data/local.yaml
@@ -1004,6 +1004,7 @@ LDM-503-15a:
     report.
   jira: DM-17137
   jira_testplan: DM-17136
+  test_spec: 'DMTR-231'
 LDM-503-16:
   description: This milestone builds upon LDM-503-15 to demonstrate the production
     of a complete data release under simulated operational conditions.
@@ -1011,6 +1012,14 @@ LDM-503-16:
   jira_testplan: DM-17138
   short_name: 'Ops Rehearsal for DRP #3'
   test_spec: ''
+LDM-503-16a:
+  description: This milestone describes a software release of the LSST Science Pipelines
+    in support of activities in late 2023 and early 2023. The contents of the release
+    are described in LDM-564. The release will be accompanied by a characterization
+    report.
+  jira: DM-32561
+  jira_testplan: DM-32560
+  test_spec: ''
 LDM-503-17:
   comment: ''
   description: This milestone builds upon LDM-503-16 to demonstrate successful operation
diff --git a/data/pmcs/202110-ME.xls b/data/pmcs/202110-ME.xls
new file mode 100644
index 0000000..79f52fa
--- /dev/null
+++ b/data/pmcs/202110-ME.xls
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:95d66a91ed2c4e4e364aaa84e6ea0b092024a0ee25ebbdc6caaf9a271da36afd
+size 3518976
diff --git a/milestones/utility.py b/milestones/utility.py
index b05fe37..89a0526 100644
--- a/milestones/utility.py
+++ b/milestones/utility.py
@@ -36,6 +36,7 @@
     "SMTN",
     "SQR",
     "TEST",
+    "RTN",
 ]