diff --git a/23.md b/23.md
index e5e85ff9..2586ac0c 100644
--- a/23.md
+++ b/23.md
@@ -60,3 +60,7 @@ References to other Nostr notes, articles or profiles must be made according to
   "id": "..."
 }
 ```
+
+### Replies & Comments
+
+Replies to `kind 30023` MUST use [NIP-22](./22.md) `kind 1111` comments. 
\ No newline at end of file