American Football Rules IFAF Approved Ruling 3-5-2:III and VII

III. On third down (no change of team possession), ball carrier A27 goes out of bounds or Team A’s legal forward pass falls incomplete. During this interval between downs, there is no other referee’s timeout. Before the fourth down snap, substitute B75 enters the game and then departs without remaining in the game for one play. RULING: Dead-ball foul. Penalty –
Five yards from the succeeding spot. [Cited by 3-5-2-d]
IV. Team A has 11 players in the huddle. A81 mistakenly thinks he has been replaced and runs to his team area. He is immediately sent back onto the field and assumes a position on the
line of scrimmage near his sideline. The entire team has been stationary for one second before the snap and there has not been a referee’s timeout. RULING: Dead-ball foul. The player loses his status as a participant when he enters the team area while the ball is dead, and then must adhere to substitution rules. Penalty – Five yards from the succeeding spot, or 15 yards from the succeeding spot if this is judged to be a violation of Rule 9-2-2-b. (Rules 3-5-2-d and 9-2-2-b).
V. After the ball is ready for play and the umpire (or centre judge) is in his regular position, Team A quickly replaces some players with substitutes, gets set for the required one second and
snaps the ball. The umpire (or centre judge) is attempting to get to the ball to allow the defense to match up, but he is unable to prevent the snap. RULING: The play is shut down, the game clock is stopped and the defense is allowed to substitute in response to Team A’s late substitutions. No foul. The play clock is set to 25 seconds and starts on the ready-for-play signal. The game clock starts on the ready-for-play signal or the snap, depending on its condition when play was stopped. The referee informs the Team A head coach that any subsequent such actions will result in a foul against the team for unsportsmanlike conduct under Rule 9-2-3.
VI. Between scrimmage downs, one or more Team B substitutes enter the field of play. Before the snap for the next down, more than 11 Team B players intentionally stay on the field of play
as long as possible (over three seconds) to disguise the defensive personnel, the type of defense and the pass coverage. RULING: Dead-ball foul on Team B, illegal substitution. Penalty — Five yards from the succeeding spot (Rule 3-5-2-c).
VII. After a down that resulted in first and 10 at the B-40, eleven players of Team A, which runs a no- huddle offense, move to their various positions to set for the next play. The ball is ready for
play when A22 runs onto the field from his team area, and after he pauses at the top of the numbers, he or the coaching staff apparently realises that he is the 12th player. A22 then turns and runs back to his team area. The ball has not been snapped. RULING: Dead- ball foul for a substitution infraction. By interpretation A22 has become a player by entering his team’s “effective huddle” and thus must remain in the game for at least one play. Five- yard penalty. Team A will have first and 15 at the B-45. (Rule 2-27-9-b) [Cited by 3-5-2-d]