Permit assets in contribution-focused forks

TRADEMARKS.md

@@ -24,10 +24,24 @@ An unofficial Mod may use wording such as “Example Mod for NETfishing” if it
 name and presentation remain clearly distinct and it displays an unofficial
 notice.
 
-## Forks and redistributed code
+## Contribution forks
+
+A qualifying Contribution Fork under `ASSET-LICENSE.md` may retain the
+NETfishing and Woofmeow names, logos, icons, and trade dress already present in
+the official source repository solely as necessary to reproduce, modify, and
+test the Project while preparing a proposed contribution. The source-control
+host's visible fork relationship or an equivalent repository notice must make
+its unofficial contribution purpose clear.
+
+This permission does not allow a Contribution Fork to use NETfishing or
+Woofmeow branding to advertise a public build, release, service, community
+edition, or independent product. It does not imply acceptance, sponsorship,
+endorsement, or official status.
+
+## Other forks and redistributed code
 
 The GNU GPL permits forks and redistribution of covered code. A fork or
-modified distribution must:
+modified distribution that is not a qualifying Contribution Fork must:
 
 - use a distinct product name;
 - remove NETfishing and Woofmeow logos, icons, and official trade dress;