Okla. Stat. tit. 36, § 3616.1

A. Unless specifically excluded in a separate written endorsement between the named insured and the insurer, every property or motor vehicle liability policy issued in the state in which the named insured is a trust created under the laws of this state and the property or motor vehicle is owned by or is an asset of the trust, the trustor of the trust shall also be considered a named insured under the policy and shall be afforded coverage under the policy. B. Coverage of the trustor of a named insured trust as provided for in subsection A of this section, shall be continuous and shall not be limited unless specifically provided for in the policy.