If the governing body fails to grant the request contained in a petition for annexation within thirty (30) days after the last publication of the notice, or refuses to grant the request, the petitioners may file their petition with the clerk of the district court in the county in which the situs of the municipal government is located. Notice of the filing shall be served upon a deputy municipal clerk and upon the mayor together with a notice of the time and place that the district court will hear the petition. The notice must be given at least ten (10) days before the date of the hearing. The hearing on the petition may be held at a regular or special term of the district court or by the court in vacation.
Okla. Stat. tit. 11, § 21-106