Okla. Stat. tit. 34, § 11

Notice of the appeal provided for in the preceding section shall be served upon the Attorney General and upon the party who filed such ballot title, or on any of such parties, at least five (5) business days before such appeal is heard by the court. The Attorney General shall, and any citizen interested may, defend the ballot title from which the appeal is taken. Other procedure upon such appeals shall be the same as is prescribed for appeals from petitions filed as set forth in Section 8 of this title.