2015 New York Laws
PML - Racing, Pari-Mutuel Wagering and Breeding Law
Article 2 - (Racing, Pari-Mutuel Wagering and Breeding Law) THOROUGHBRED RACING AND BREEDING
219 - Advertising or promotional material.

  219. Advertising or promotional material. Notwithstanding any other
  provision of law, rule or regulation nothing herein shall be  deemed  to
  authorize  the  stewards  or the racing and wagering board to promulgate
  any rule or regulation which would prohibit a jockey  from  wearing  any
  advertising  or promotional material on his or her clothing. The wearing
  of such advertising or promotional material will be permitted only  when
  the  owner of a horse for whom such jockey is riding provides the jockey
  with prior written authorization. Notwithstanding the foregoing, when  a
  corporation,  company or any other entity sponsors a race or race day at
  any franchised corporation or any  racing  association  or  corporation,
  such  racing  association may prohibit a jockey from wearing advertising
  material that represents a competitor of  such  sponsoring  corporation,
  company or other entity.