Okla. Stat. tit. 12, app 1 R. 1.31
When points of law which are to be presented on the appeal can be determined without an examination of trial court's record, the parties may within thirty (30) days after the filing of the petition in error, prepare and sign a statement of the case showing how the questions arose and were decided and setting forth as many of the facts as are essential to a decision on appeal. The statement with a copy of the trial court's decision attached shall be filed with the clerk and submitted to the trial court. The statement together with such additions as the trial court may consider necessary fully to present the questions to be urged, shall be approved by the trial judge or the judge's successor and shall be certified by the judge as the record on appeal. The designations of record by both parties need not be filed until the contents of the record are settled pursuant to this rule, and the designations must state that a statement in lieu of record on appeal is used for the appeal. Whenever possible, the resulting record on appeal shall be created through the designation of record process of the OUCMS, and shall include a notation that the record is a result of the above-referenced process.
Okla. Stat. tit. 12, app 1 R. 1.31