diff --git a/index.bs b/index.bs
index 7c9df48..d416705 100644
--- a/index.bs
+++ b/index.bs
@@ -121,10 +121,6 @@ This section gives the initial contents of the remote end definition and local e
 [=Remote end definition=]
 
 <xmp class="cddl remote-cddl">
-Extensible = {
-  *text => any
-}
-
 Command = {
   id: uint,
   CommandData,
@@ -143,10 +139,6 @@ EmptyParams = { Extensible }
 [=Local end definition=]:
 
 <xmp class="cddl local-cddl">
-Extensible = {
-  *text => any
-}
-
 Message = (
   CommandResponse //
   ErrorResponse //
@@ -185,6 +177,14 @@ EventData = (
 )
 </xmp>
 
+[=Remote end definition=] and [=local end definition=]:
+
+<xmp class="cddl remote-cddl local-cddl">
+Extensible = {
+  *text => any
+}
+</xmp>
+
 Capabilities {#protocol-capabilities}
 -------------------------------------
 
diff --git a/schemas/at-driver-local.cddl b/schemas/at-driver-local.cddl
index 6d0f27c..59d4191 100644
--- a/schemas/at-driver-local.cddl
+++ b/schemas/at-driver-local.cddl
@@ -1,7 +1,3 @@
-Extensible = {
-  *text => any
-}
-
 Message = (
   CommandResponse //
   ErrorResponse //
@@ -39,6 +35,10 @@ EventData = (
   InteractionEvent
 )
 
+Extensible = {
+  *text => any
+}
+
 SessionResult = (SessionNewResult)
 
 CapabilitiesRequest = {
diff --git a/schemas/at-driver-remote.cddl b/schemas/at-driver-remote.cddl
index 94e3cd0..3d3f77b 100644
--- a/schemas/at-driver-remote.cddl
+++ b/schemas/at-driver-remote.cddl
@@ -1,7 +1,3 @@
-Extensible = {
-  *text => any
-}
-
 Command = {
   id: uint,
   CommandData,
@@ -16,6 +12,10 @@ CommandData = (
 
 EmptyParams = { Extensible }
 
+Extensible = {
+  *text => any
+}
+
 SessionCommand = (SessionNewCommand)
 
 CapabilitiesRequest = {