New York Codes, Rules and Regulations
Title 19 - DEPARTMENT OF STATE
Chapter VII - State Athletic Commission
Part 209 - Contract Oversight
Section 209.14 - "Low-blow" clause mandatory in professional boxing

All contracts between a professional boxer and a licensed promoting corporation for the services of a male boxer in a boxing contest or exhibition, shall contain the following paragraph:

"The boxer agrees to equip himself with a foul-proof guard of his own selection, type to be approved by the Commission, which will obviate the necessity of any claim being made for a low blow during the contest. It is expressly understood that this contest or exhibition is not to be terminated by a low blow, as the protector selected by the boxers, is, in his opinion, sufficient protection to withstand any so-called low-blow which might incapacitate the said boxer."