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 racing and wagering board to promulgate\nany rule or regulation which would prohibit a jockey from wearing any\nadvertising or promotional material on his or her clothing. The wearing\nof such advertising or promotional material will be permitted only when\nthe owner of a horse for whom such jockey is riding provides the jockey\nwith prior 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