Wash. Admin. Code § 260-32-040
(2) A jockey may be an owner of a horse(s) competing at the race meet where the jockey is riding under the following conditions:
[Statutory Authority: RCW 67.16.020. WSR 12-03-075, § 260-32-040, filed 1/13/12, effective 2/13/12. Statutory Authority: RCW 67.16.020 and 67.16.040. WSR 06-07-065, § 260-32-040, filed 3/10/06, effective 4/10/06. Rules of racing, § 144, filed 4/21/61.]