N.Y. Comp. Codes R. & Regs. tit. 19, § 211.37 – Counting for knockdowns.

(a) When a boxer falls to the floor of the ring during the progress of a round, the timekeeper or alternate referee shall immediately begin the official count and shall continue to the count of 10 at the rate of 1 stroke per second, unless the referee shall direct that the count be suspended.
(b) A boxer shall receive a 20 second count if the boxer is knocked out of the ring. The boxer is to be unassisted by spectators or his/her seconds. If assisted by anyone, the boxer may lose points or be disqualified with such a decision being within the sole discretion of the referee.