Okla. Stat. tit. 64, § 64-1086: Execution of instruments - Approval by Governor

Any instrument, easement, contract, or deed which may be

required in, or convenient to, the exercise of the powers granted in

Section 1 of this act shall be executed by the chairman or presiding

officer and attested by the secretary, if such instrument be

executed by a board or commission, and if such instrument be

executed by an officer, it shall be signed by said officer. No such

contract, easement, deed or instrument of conveyance shall be

effective unless and until the approval of the Governor is endorsed

thereon in writing.