QA-PRO-1: What is the provisional throw rule and when should it be used?
A provisional throw is used when a player disagrees with the group’s ruling and no Official is available, or when it might save time in case of a possible lost or OB disc, or missed mandatory. Provisional throws allow play to continue by deferring the ruling until the status of the disc in question can be determined, or an Official is available to settle the matter. In the case where a ruling is disputed or uncertain, a player may have to play out from both the original and the provisional throws, essentially completing two legs. Once a ruling has been made, only the throws for the correct leg are counted.