so if you hit a 300yrd drive that you think may have gone into a water hazard at the end but you are not sure so you play a provisional.
Then you find it in the lateral hazard is it tough luck on you as you already have a ball in play (the prov) or can you still take your (within) 2 clublength drop and play on?
Is the provisional only in case the ball is lost outside of the hazard?