[kdf5]

7-1-3...ART. 3 . . . Following the ready-for-play and after touching the ball, the snapper shall not:

a. Remove both hands from the ball.
b. Make any movement that simulates a snap.
c. Fail to clearly pause before the snap.
d. Following adjustment, lift or move the ball other than in a legal snap.

PENALTY: Encroachment (Arts. 1, 5, 6) – (S7-18); snap infraction (Arts. 2, 3); false start (Art. 7) – (S7-19) – 5 yards.

a-d would cause the ball to remain dead. If he was moving forward and picked up the ball and snapped it then technically you would have illegal motion but I would blow it dead and not let the play start and forget the IM. Nothing good would come of letting the play go.