A permit expires one year from the date of issuance unless canceled or revoked prior to its expiration. For purposes of determining the expiration date of all permits, the date of issuance is the date that a permit is first issued by a duly authorized representative of the Department. An expired permit shall follow the regulations listed in 310:250-3-4. Late Renewal.
Okla. Admin. Code § 310:281-5-3