Okla. Stat. tit. 36, § 3635.1

All policies insuring against loss resulting from liability imposed by law for bodily injury or death suffered by any person arising out of the ownership, maintenance or use of a motor vehicle, as defined in Section 3635 of this title, shall expire at 12:01 a.m. Standard Time on the expiration date stated in the policy. This section shall apply to all such policies on the first policy renewal date after December 31, 1982.