The Rules of Ultimate
Key New Rule
Difference to USAU
7. The Pull
7.5.1. If the defence chooses to call offside, the thrower must establish a pivot point as per 7.9, 7.10, 7.11, or 7.12 and then play restarts as soon as possible as if a time-out had been called at that location.
7.5.2. If the offence chooses to call offside, they must let the disc hit the ground untouched and then resume play as if a brick has been called (no check is required).
7.6. As soon as the disc is released, all players may move in any direction.
7.8. If an offensive player, in-bounds or out-of-bounds, touches the disc before it hits the ground, and the offensive team fails to subsequently establish possession, that is a turnover (a “dropped pull”).
7.11. If the disc initially contacts the playing field and then becomes out-of-bounds without contacting an offensive player, the thrower must establish a pivot point where the disc first crossed the perimeter line, or the nearest location in the central zone if that pivot point would be in their defending end zone
7.11.1. If the disc does contact an offensive player before it becomes out-of-bounds the thrower must establish a pivot point where the disc first crossed the perimeter line, even if that pivot point is in their defending end zone.