(a) Thoroughbred and Appaloosa horses may be entered in Quarter Horse races under the following conditions:

(b) The association which conducts the meeting shall, as provided in subdivision (b) of Business and Professions Code Section 19613, pay to the horsemen's organization representing Thoroughbred horsemen an amount for administrative expense and services rendered to horsemen equivalent to 1.5 percent of the amount available to Thoroughbred horses for purses, and an amount for a pension plan for backstretch personnel to be administered by the horsemen's organization equivalent to an additional 1 percent of the amount available to the Thoroughbred horses for purses. The remainder of the portion shall be distributed as purses.

(c) Any redistributable money paid to the Board pursuant to Business and Professions Code Section 19641 which is paid to a welfare fund established by a horsemen's organization from races with both Thoroughbred and Quarter Horses shall be divided pro rata between the two welfare funds based on the number of Thoroughbreds and Quarter Horses in the race.

(d) Notwithstanding the composition of the qualifying field, payments made to horsemen's associations as specified in Business and Professions Code Section 19533(b) shall be made on the proportional basis of the horses officially starting the race.