"Traveling" Signal at snap

[maven]

7.2.7 SITUATION: The quarterback by voice command has signaled his teammates
to assume a set position while he is standing upright behind the center.
The quarterback steps forward and places his hands under the center to receive
the snap: (a) at the instant the snap is made; or (b) which is made after he is
motionless, but prior to one second having elapsed; or (c) which is made after he
is motionless for one second; or (d) which is made after he is motionless for one
second, but while he is stepping backward with one foot as the snap is made.
RULING: In (a), it is illegal motion. In (b), it is an illegal shift. In (c), it is legal. In
(d), it is legal unless a teammate is also in motion at the snap. COMMENT: If the
quarterback drops his hands under the snapper without stepping forward, it is a
shift and not motion. (2-39; 7-2-6)