N.Y. Comp. Codes R. & Regs. tit. 9, § 4038.5
(a) All claims shall be in writing, sealed in an envelope and deposited in a locked box provided for this purpose by the racing secretary or the racing secretary’s designee, at least 10 minutes before post time. Claim slip forms must be completely filled out and must, in the judgment of the stewards, be sufficiently accurate to identify the claim, otherwise the claim will be void. No money shall accompany the claim. Each person desiring to make a claim, unless the person has such amount to the person’s credit with the association, must first deposit with the association the whole amount of the claim in a manner approved by the racing secretary or designee for which a receipt will be given. Unless funds of the claimant available in the claimant’s account with the association are sufficient, in the judgment of the stewards, to pay the cost of any post-race testing requested on the claim form by the claimant, the commission shall not conduct such testing. If such funds are sufficient, an amount sufficient to pay for the post-race testing requested on the claim form shall be frozen in such claimant’s account to secure anticipated costs of testing. All claims shall be passed upon by the stewards. If more than one person should enter a claim for the same horse, then the disposition of the horse shall be decided by lot by the stewards. Claimed horses shall be taken after the race to the test barn for a determination of soundness and for any test samples to be collected. The person determined by the stewards to have the right of claim shall become the owner of the horse when the race is started, whether the horse is sound or unsound or injured before or during the race or after the race, except that:
(4) a claim is voidable at the discretion of the new owner if the horse is placed on the veterinarian’s list following an examination by the State veterinarian or other veterinarian who has been designated by the commission to examine claimed horses in the test barn following the race for a determination of soundness for either of the following reasons: When a horse is placed on the veterinarian’s list pursuant to this paragraph, the claimant shall be deemed to have voided the claim and the horse shall be removed from the test barn area by the original owner, unless the claimant or a representative of the claimant is present at the test barn to be informed of the determination of the State or designated veterinarian and, upon being informed of the veterinarian’s findings, decides immediately to accept the horse.