Continuing the discussion from "Ascension mod" or: "Winning DDA: the mod":
Tl;Dr you never need permission to fork anything that originated in the dda codebase.
DDA is under a permissive, share-alike license for this specific reason. You don’t need permission to fork dda, and you also don’t need permission to fork anything forked from dda. This includes mods, pull requests, issues, forum posts with code, emails with json, anything.
If you tell someone to ask for permission, you are wrong.