diff --git a/extensions/pubsub/standard/recommendations/pubsub-message-payload/REC_crs.adoc b/extensions/pubsub/standard/recommendations/pubsub-message-payload/REC_crs.adoc
new file mode 100644
index 00000000..df13fd1b
--- /dev/null
+++ b/extensions/pubsub/standard/recommendations/pubsub-message-payload/REC_crs.adoc
@@ -0,0 +1,9 @@
+[[rec_pubsub-message-payload-crs]]
+[recommendation,type="general",id="/rec/pubsub-message-payload/crs", label="/rec/pubsub-message-payload/crs"]
+====
+
+*A:*
+
+An OGC API Pub/Sub notification message encoding describing data in a CRS other than WGS84 SHOULD use OGC Features and Geometries JSON.
+
+====
diff --git a/extensions/pubsub/standard/sections/clause_3_references.adoc b/extensions/pubsub/standard/sections/clause_3_references.adoc
index 5d1d0092..871f47aa 100644
--- a/extensions/pubsub/standard/sections/clause_3_references.adoc
+++ b/extensions/pubsub/standard/sections/clause_3_references.adoc
@@ -38,4 +38,6 @@ References are to follow the Springer LNCS style, with the exception that option
 
 * [[[OGC20-004,OGC 20-004]]], _DRAFT OGC API - Records - Part 1: Core_ (2020)
 
+* [[[OGC21-045,OGC 21-045]]], _DRAFT OGC Feature and Geometriews JSON - Part 1: Core_ (2021)
+
 * [[[RFC7946,RFC 7946]]], _GeoJSON_, https://www.rfc-editor.org/rfc/rfc7946
diff --git a/extensions/pubsub/standard/sections/clause_9_pubsub-message-payload.adoc b/extensions/pubsub/standard/sections/clause_9_pubsub-message-payload.adoc
index 7629c8b7..7af8d541 100644
--- a/extensions/pubsub/standard/sections/clause_9_pubsub-message-payload.adoc
+++ b/extensions/pubsub/standard/sections/clause_9_pubsub-message-payload.adoc
@@ -19,6 +19,7 @@ an OGC API ecosystem.
 _GeoJSON_ provides a compact and machine readable encoding as a baseline for message notification.
 
 include::../requirements/pubsub-message-payload/REQ_rc-geojson.adoc[]
+include::../recommendations/pubsub-message-payload/REC_links.adoc[]
 
 ==== Identifier