Mandatory Equipment, Apparel
Article 3 All players must wear the equipment and uniform apparel listed below, which must be of a suitably protective nature, must be designed and produced by a professional manufacturer, and must not be cut, reduced in size, or otherwise altered unless for medical reasons approved in advance by the Commissioner; provided, however, that during pregame warm-ups players may omit certain protective equipment at their option, except that helmets must be worn. ........
( a) Helmet with chin strap (white only) fastened and face mask attached. Face masks must not be more than 5/8-inch in diameter and must be made of rounded material; transparent materials are prohibited.
Clear (transparent) plastic face shields for eye protection are optional. Tinted eye shields may be worn only after the League office is supplied with appropriate medical documentation and approval is subsequently granted. The League office has final approval. .....