Where manual timers are permitted by the commission there shall be three timers, who shall be in the stand 15 minutes before the first heat or dash is to be contested. Operators of mechanical timers shall have their equipment checked and be in their place of operation at least 15 minutes before the first heat or dash is to be contested. Timers shall start their watches when the first horse leaves the point from which the distance of the race is measured. The time of the leading horse at the quarter, half, three-quarters and the finish shall be taken. If odd distances are raced, the fractions shall be noted accordingly.
N.Y. Comp. Codes R. & Regs. Tit. 9 § 4110.2