Rules Analysis
Positioning before the pull:
After signaling readiness, players on the pulling team may move anywhere in their end zone, but their feet may not break the vertical plane of the goal line until the disc is released.
After signaling readiness, players on the receiving team must have one foot on the goal line that they are defending without changing location relative to one another.
If either team fails to maintain proper positioning before the pull, the observer will call "offsides" before the receiving team gains possession of the disc. The offsides call does not stop play, and the Continuation Rule (17.C) does not apply. Receiving team must have each player with one foot on the goal line prior to the pull being released. Pulling team may not have have any player’s foot cross goal line before pull has been released
A sideline player or coach who is leaving the playing field with urgency but is still on the playing field when the disc is released is not considered to be offsides or committing a false start. If a sideline player or coach on the playing field impedes a player from the other team, that is a separate violation.