amendment-Legal Definition. n. 1  The addition, deletion, correction, or other changes proposed or made to a document. 2  The term is usually capitalized when referring to an amendment in the United States Constitution (for example, the Fifth Amendment). 3  The act or process or revising something. 4  See also emendation.
On June 1, 1979, the NHL enacted a rule requiring the wearing of helmets for anyone entering the league after that date, though a âgrandfatherâ clause allowed diehard veterans to continue to go hatless if they wished.
Batting helmets have been mandatory for MLB players since 1956 and anyone reaching the big-leagues after 1983 must wear a helmet with an ear flap. Minor League players must wear flaps that cover both ears. Major League Baseball was played for more than half a century without any protection for the noggin.