Okla. Stat. tit. 11, § 11-21-106: Failure to grant request in annexation petition -

Filing in district court.

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.