All requests for refunds on sustaining or nominating payments must be made by letter to the Secretary of the New Jersey Sire Stakes Board of Trustees, postmarked on or before the 15th of the month in which the payment is due. In the event that the 15th falls on a Saturday, Sunday, or holiday, the due date will be the next business day following the 15th.
N.J. Admin. Code § 2:32A-2.11