N.Y. Racing, Pari-Mutuel Wagering and Breeding Law § 219

§ 219. Advertising or promotional material. Notwithstanding any other\nprovision of law, rule or regulation nothing herein shall be deemed to\nauthorize the stewards or the commission to promulgate any rule or\nregulation that would prohibit a jockey from wearing any advertising or\npromotional material on his or her clothing. The wearing of such\nadvertising or promotional material shall be permitted only when the\nowner of a horse for whom such jockey is riding provides the jockey with\nprior written authorization. Notwithstanding the foregoing, when a\ncorporation, company or any other entity sponsors a race or race day at\nany franchised corporation or any racing association or corporation,\nsuch racing association may prohibit a jockey from wearing advertising\nmaterial that represents a competitor of such sponsoring corporation,\ncompany or other entity.\n