Each night's racing program shall be scheduled to be completed prior to midnight. On Saturday night no race shall be called on the track that cannot within reasonable expectation be completed before midnight and in no event may betting be conducted after 11:57 p.m. on said night and the presiding judge shall cause the machines or other devices used for wagering to be locked by such time.
N.Y. Comp. Codes R. & Regs. Tit. 9 § 4101.29