(A) When a horse is entered, it must be clearly identified by statement of its name, age, and sex.
(B) Any alteration in the sex of a horse must be reported and noted by the trainer to the racing secretary, or horse identification office immediately and that office must note the same on the foal certificate and notify the proper registry.
(C) Fillies and mares that have been bred shall be reported to the racing secretary as having been bred prior to being entered in a race. The secretary shall post on the bulletin board the names of all fillies and mares that have been bred and to what stallion or stallions.
(D) A mare that has been bred shall not be eligible to be entered in a claiming race unless written certification of the stallion owner is attached to foal certificate showing the fee for the stallion service has been satisfied and that the successful claimant will not be responsible for the stallion fee.