Got this from the NFL rulebook and can find no evidence that this particular rule is any different at any other level:
"False Start
.
It is a False Start if the ball has been placed ready for play, and, prior to the snap, an offensive player who has assumed a set position charges or moves in such a way as to simulate the start of a play, or if an offensive player who is in motion makes a sudden movement toward the line of scrimmage.
Any quick abrupt movement by a single
offensive player, or by several offensive players in unison, which simulates the start of the snap, is a false start."
I emphasized the key phrases that show that the "rolling start" as DLS does it is not illegal.