N.Y. Comp. Codes R. & Regs. Tit. 19 § 211.17 - Number and appearance of seconds
Each contestant shall have no more than three seconds, each of whom shall be licensed by the Commission, and each such second while assisting in the boxer's corner shall wear only such costume approved by the Commission. Provided, however, that each contestant in a championship bout may have no more than four licensed seconds. Only one second may be inside the ring ropes between rounds.
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