The names of jockeys and the post positions of their horses, scratches, etc. shall be printed on the daily programs. When such information is not available at the time the programs are printed, the same and all other changes in the official program shall be posted in a conspicuous place both in front of the clubhouse and in front of the grandstand, where the same may be easily read by the public, and also shall be announced over the public address system.
N.Y. Comp. Codes R. & Regs. Tit. 9 § 4006.1