An apprentice jockey may ride in a race in which quarter horses are eligible to start, but may not claim apprentice allowance in such races and the riding of the winner of such a race shall not be considered in computing the expiration of his right to claim apprentice allowances in races restricted to thoroughbreds. No sex allowances or scales of weight-for-age shall be used in quarter horse racing.
Ill. Admin. Code tit. 11, § 1440.50