Custom Edit Times by Board?

[Phyl]

I've seen the mod for custom edit times by GROUP, but what I really need is that functionality by BOARD. There are some boards that I want no edits on (after a courtesy 2 minute free for all << this is what gets me) and some boards that I want my users to be able to edit on forever.

Right now I can have them able to edit forever, only for a specific time, or not at all, across all boards.