Each racing association or corporation shall publish an official racing program that shall denote the use of furosemide for the programmed race and at least the six most recent purse races in the following manner:
(L) horses running on furosemide;
(L1) horses running the first time on furosemide.
N.Y. Comp. Codes R. & Regs. Tit. 9 § 4003.33