diff --git a/32.md b/32.md
index 46414736..6e6bf707 100644
--- a/32.md
+++ b/32.md
@@ -29,7 +29,9 @@ This is a way of attaching standard nostr tags to events, pubkeys, relays, urls,
 Label Tag
 ----
 
-An `l` tag's value can be any string. If using an `L` tag, `l` tags MUST include a `mark` matching an `L` tag value in the same event.
+An `l` tag's value can be any string. If using an `L` tag, `l` tags MUST include a mark matching an `L`
+tag value in the same event. If no `L` tag is included, a mark SHOULD still be included. If none is
+included, `ugc` is implied.
 
 Label Target
 ----