Will you might want to consider this mod.
Cyb - Advanced Forum Rules - vBulletin.org Forum
The benefits are you can force members to accept them before their first post. Also if they are updated and or breached, you can reissue acceptance to everyone or an individual.
I find it very very useful. Here is a copy if you want to utilise for the basics here.
Midlands Weather Forum - A UK Weather Forum - Forum Rules