Once a team has made their choice on the extra point, they can only change their decision by taking a time-out. Should the defense gain possession of the ball the ball shall immediately be declared dead. If a player carries the ball across the goal line they are defending and the ball becomes dead while in their team's possession, it is a safety. If a team commits a foul in the end zone where the spot of enforcement is designated as the spot of the foul, it will be declared a safety. When a player intercepts a forward pass or catches a scrimmage or free kick between their five yard line and their goal line and their momentum carries them into the end zone where the ball becomes dead, the ball will belong to the receiving team at the spot of the catch or reception.
Any act listed below or any other act of unnecessary roughness is a personal foul.
Trip an opponent. Contact an opponent who is on the ground. Throw the runner to the ground. Hurdle any other player. Contact an opponent either before or after the ball is declared dead Make any contact with an opponent which is deemed unnecessary of any nature including using fists, locked hands, elbows or any part of the forearm or hand, except according to Rule.