Okla. Stat. tit. 28, § 31.1

The clerk of the district court shall charge and collect no fees in any proceeding for guardianship of a minor over the age of seventeen (17) years, where there shall be attached to the petition for the appointment of guardian an affidavit that the minor has applied for enlistment in the armed forces of the United States and that the sole purpose of the proceeding is to secure legal permission for such enlistment.