ARTICLE 4.Violation of each of the following (a-c) is a live-ball foul; the play is allowed to continue.
a. Formation. At the snap Team A must be in a formation that meets these requirements:
5. In a scrimmage kick formation at the snap (Rule 2-16-10) Team A may have fewer than five linemen numbered 50-79, subject to the following conditions:
(a) Any and all linemen not numbered 50-79 who are ineligible receiver(s) by position become exceptions to the numbering rule when the snapper is established.
(b) Any and all such numbering-exception players must be on the line and may not be on the end of the line. Otherwise, Team A commits a foul for an illegal formation.
(c) Any and all such players are exceptions to the numbering rule throughout the down and remain ineligible receivers unless they become eligible under Rule 7-3-5 (forward pass touched by an official or a Team B player).
The conditions in 5(a)–5(c) are no longer in effect if prior to the snap a period ends or there is a timeout charged to the referee or one of the teams.
Approved Ruling 7-1-3 I. A21 is legally on the end of the line of scrimmage next to A88, who is in a three-point stance. Team A stops for one second while A21 and A88 are in the above positions, and then A21 moves to a legal backfield position and stops. Then A88 moves to a wider position on the line. RULING: Legal if both A21 and A88 are stationary at the snap (Rules 2-22-1 and 7-1-4).
Approved Ruling 7-1-3 II. A21 is legally on the end of the line of scrimmage next to A88, who is in the stance of a restricted lineman. Team A has stopped for one second when A21 leaves the line of scrimmage and goes in motion into the backfield. A88 moves to a wider position on the line. RULING: A88 may break his three-point stance since he is now on the end of the line of scrimmage, but Team A must stop again for one second before the snap to make the play legal (Rule 7-1-4).
PENALTY [a-c]—Live-ball foul: Five yards from the previous spot [S19 or S20]. For live-ball fouls occurring when or after the snap starts during scrimmage kick plays other than field goal plays: Five yards from the previous spot or if the kick crosses the neutral zone, five yards from the spot where the subsequent dead ball belongs to Team B [S19 or S20].