covered horse
(4) Covered horse The term “covered horse” means any Thoroughbred horse, or any other horse made subject to this chapter by election of the applicable State racing commission or the breed governing organization for such horse under section 3054(k) of this title, during the period— (A) beginning on the date of the horse’s first timed and reported workout at a racetrack that participates in covered horseraces or at a training facility; and (B) ending on the date on which the Authority receives written notice that the horse has been retired.