1. (a) A leading horse is entitled to any part of the course, but when another horse is attempting to pass in a clear opening, the leading horse shall not cross over so as to compel the passing horse to shorten its stride.
2. (b) A horse shall not interfere with any other horse. Interference is defined as bumping, impeding, forcing or otherwise causing any other horse to lose stride, ground, momentum or position.
3. (c) A horse which interferes with another as defined in subsections (a) or (b) may be disqualified and placed behind the horse so interfered with or last if, in the opinion of the Stewards, the horse interfered with was not at fault and the interference occurs in a part of the race where the horse interfered with loses the opportunity to place where it might be reasonably expected to finish.
4. (d) Jockeys shall not ride carelessly, or willfully, so as to permit their mount to interfere with any other horse.
5. (e) Jockeys shall not strike or strike at another horse or jockey so as to impede, interfere with, intimidate, or injure.
6. (f) If a jockey rides in a manner contrary to this rule, the mount may be disqualified and the jockey may be suspended or otherwise disciplined by the Stewards.

During the running of the race:

Note: Authority cited: Section 19562, Business and Professions Code. Reference: Sections 19461 and 19562, Business and Professions Code.

History

1. Amendment filed 4-21-83; effective thirtieth day thereafter (Register 83, No. 17).

2. Amendment filed 8-13-97; operative 9-12-97 (Register 97, No. 33).

3. Amendment filed 11-22-2016; operative 1-1-2017 (Register 2016, No. 48).

4. Amendment of subsection (f) filed 3-22-2018; operative 7-1-2018 (Register 2018, No. 12).

5. Amendment filed 4-28-2026; operative 7-1-2026 (Register 2026, No. 18).