I don't know the names of other country's governing bodys, but the UKPSF in the UK are the point of contact with the Home Office etc regarding paintball, and could be usful in anticipanting what regulations may be required by the powers-that-be should the problem reach theere attention, as well as interpretation of the law, and in implementing any plans requiring player/marker registration.
I read in another thread that a lot of Euro countrys have governing bodys as well as Oz, New Zealand, and SA.