A. In all civil actions the Court shall apply any laws of the United States that may be applicable, any authorized regulations of the Interior Department which may be mandatory, and any ordinances, codes or customs of the Osage Nation which are applicable to the Indian country over which the Court has jurisdiction.

B. Where any doubt arises as to the customs and usages of the Nation, the Court may request the advice of counselors familiar with these customs and usages.

C. Any matters that are not covered by the traditional customs and usages of the Nation, or by applicable federal laws and regulations, or by applicable Osage Nation law shall be decided by the Court according to the law of the state in which the matter in dispute lies. ONCA 11-41, eff. Apr. 12, 2011.