All contracts for boxing bouts shall include the following paragraph:
"The boxer agrees to equip himself with an abdominal guard of his own selection, type to be approved by the commission, which will obviate the necessity of any claims being made for low blows during the contest. It is expressly understood that this contest is not to be terminated by a low blow, as the protector selected by the boxer is, in his own opinion, sufficient protection to withstand any so-called low blow."
Haw. Code R. § 16-74-44