In both
(a) and
(b), the coach will have 15 seconds to replace the injured player. In
(a), the 15 seconds should start after the coach can turn his/her attention from the injured athlete to the duty of making a replacement. In
(b), the 15 seconds would begin as soon as A1 has been returned to the bench. In both cases, the timer should be instructed by the official to sound a warning horn and start timing the 15 seconds and sound the horn to notify the official after 15 seconds have elapsed.