Rule 7, Section 3, Article 3

During a scrimmage down after a change of team possession, no player may hand the ball forward to a teammate.

Rule 2, Section 27 Muff

A muff is the touching of a loose ball by a player in an unsuccessful attempt to secure possession.

Rule 8, Section 2, Article 3

If an opponent of the scoring team commits a foul (other than unsportsmanlike conduct or a nonplayer foul) during a down in which a touchdown is scored and there was a change of possession during the down, and such foul occurs after the change of possession, the scoring team may accept the results of the play and choose enforcement of the penalty:

a. On the try, or

b. On the subsequent kickoff.

Rule 8, Section 2, Article 2

If an opponent of the scoring team commits a foul (other than unsportsmanlike conduct or a nonplayer foul) during a down in which a touchdown is scored and there was not a change in possession during the down, A may accept the results of the play and choose enforcement of the penalty:

1. On the try, or
2. On the subsequent kickoff.

Rule 6, Section 2, Article 1

K may punt, drop kick or place kick from in or behind the neutral zone before team possession has changed. It is not necessary to be in a scrimmage kick formation to execute a legal scrimmage kick. K may not punt, drop kick or place kick from beyond the neutral zone. R may not punt, drop kick, or place kick.

Rule 2, Section 4, Article 1

A catch is the act of establishing player possession of a live ball which is in flight, and first contacting the ground inbounds while maintaining possession of the ball or having forward progress of the player in possession stopped while the opponent is carrying the player who is in possession and inbounds.