Okla. Stat. tit. 59, § 1038

A. No license shall be issued for longer than one (1) year and all licenses shall expire on the last day in the birth month of the licensee. B. An application for the renewal of a license which is received more than thirty (30) days following the date of expiration and which is accompanied by a fee established pursuant to Section 1000.5 of this title, and proof of current continuing education requirements, may be accepted and the license reissued without examination. C. The fee for late renewal and the continuing education requirements shall not be required of any holder of a license which expires while such holder is in military service, if application for renewal is made within one (1) year following the service discharge of such person.