diff --git a/03.md b/03.md
index ab9795a2..cf21c3ec 100644
--- a/03.md
+++ b/03.md
@@ -45,14 +45,17 @@ timestamp validated at block [810391]
 Users MAY verify when they first saw an event by publishing a `kind:4341` event.
 
 - One or more `stamp` tags MUST be included indicating event ids and timestamps. Event addresses MUST NOT be used.
-- The `content` field MAY provide any human-readable explanation of the event.-
+- One or more `k` tags SHOULD be included indicating the kind(s) of the event(s) being referred to.
+- The `content` field MAY provide any human-readable explanation of the event.
 
 ```jsonc
 {
+  "kind": 4341,
   "content": "I vaguely remember hearing about this note last year",
   "tags": [
     ["alt", "A timestamp attestation event"],
-    ["stamp", "e71c6ea722987debdb60f81f9ea4f604b5ac0664120dd64fb9d23abc4ec7c323", 1738617405]
+    ["stamp", "e71c6ea722987debdb60f81f9ea4f604b5ac0664120dd64fb9d23abc4ec7c323", 1738617405],
+    ["k", "10002"]
   ]
 }
 ```