Rule 68 – Treatment of Reserves
A Reserve shall be treated in every respect as if it were due to run in the Race until it is known that it will not be called upon to run. A Reserve which is not available to run when called upon to do so shall be subject to all Rules relating to Withdrawals.
The conditions of a Race, or the Racing Manager, may provide or decide that a Reserve shall not be called upon to travel or to run unless the Trainer is notified by a stated time.