Rule 3280. Every jockey shall fulfill his or her scheduled riding engagements, unless excused by the stewards. A jockey shall not be forced to ride a horse he or she believes to be unsafe, but if the stewards find that a jockey's refusal to fulfill a riding engagement is based on a personal belief unwarranted by the facts and circumstances, such jockey may be subject to disciplinary action.
Mich. Admin. Code R. 431.3280