Could a hummer that seats 10 possible seat 12 or are you not allowed to do that?

like theres 10 people 5 girls 5 boys and we might have to make room for one more of each could we do thatCould a hummer that seats 10 possible seat 12 or are you not allowed to do that?Most traffic laws state that you must have a seat-belt for every passenger in your vehicle. So if you have 12 seat-belts in there there shouldn't be any problem.