Golf Rule 27: Ball Lost or OB and Provisional Balls
· a. Procedure. If a ball may be lost outside a water hazard or may be out of bounds, to save time the player may play another ball provisionally in accordance with Rule 271. The player must: (i) announce to his opponent in match play or his marker or a fellowcompetitor in stroke play that he intends to play a provisional ball; and. (ii) play ...