Okla. Stat. tit. 26 § 10-102
Every party nominee for Presidential Elector shall subscribe to an oath, stating that said nominee, if elected, will cast a ballot for the persons nominated for the offices of President and Vice President by the nominee's party. The oath shall be notarized by a notary public and filed with the Secretary of the State Election Board no fewer than ninety (90) days prior to the General Election. Failure of any party nominee to take and file the oath by such date shall automatically vacate his or her nomination and a substitute nominee shall be selected by the state central committee of the appropriate political party. It shall be the duty of the Secretary of the State Election Board to notify the chairman of the state central committee of the failure of any nominee to file the oath. Refusal or failure to vote by a Presidential Elector for the persons nominated for the offices of President and Vice President by the nominee's party shall constitute a violation of the oath and shall result in the immediate forfeiture of the Elector's office. In such event, the vote shall not be recorded, a vacancy shall be declared, and the Presidential Electors present shall proceed to fill such vacancy as provided in Section 10-108 of this title.
Okla. Stat. tit. 26, § 10-102