User to confirm when accessing specific forum for first time?

[dRiFT]

Hi, I wondered if anyone knew if a VB mod already existed to do this...

I basically want to have one or more sections of a forum marked so that the first time a user attempts to access them a message will be displayed and the user will be asked to confirm that they agree to some specific terms before the forum can be viewed. The user reads the terms and then clicks the button to confirm. Once this has been done the user can access the forum(s) as normal and without being asked again on subsequent visits. The remainder of the forum sections will behave as normal with no confirmation required.

Thanks in advance!