MyBB Community Forums

Hi everyone!
Im trying to make a little modification to my board and i dont know how to do it. I have two forums at my board with many sub-forums and i would like to put a specify restriction to one of my sub-forum , not at all of them. The resctriction mean that nobody to cannot opened new threads unless he completed couple of filelds like : Location , Age , What is it , What is looking for etc.
It`s kinda strictly restrcition but is very useful for me
Any idea is more than welcome. Thanks