rules for pan ams or mundial?

or for any BJJ tournament, Do they all follow the same rules and point system? were can i find them? and also can someone break down a match? how much time do you get per match,is there overtime at the end if score is equal

Pan ams and Mundials are organized by International Brazilian Jiu-Jitsu Federation (IBJJF). Most of the other competitions copy their rules, though not all the details. You can find IBJJF rules from their website,

Thank You