7-5-12 . . . Ineligible A players may not advance beyond the expanded neutral zone on a legal forward pass play before a legal forward pass that crosses the neutral zone is in flight. If B touches the pass in or behind the neutral zone, this restriction is terminated. An ineligible is not illegally downfield if, at the snap, he immediately contacts a B lineman and the contact does not continue beyond the expanded neutral zone.
Once the pass crosses the neutral zone lineman can advance downfield. There's no restriction on how far they can go. If the forward pass doesn't cross the NZ they can go downfield at any time.
|