In accordance with Article III, Section 1 of the Osage Nation Constitution, the base membership of the Osage Nation shall consist of those persons whose names appear on the final roll of the Osage Tribe of Indians pursuant to the Act of June 28, 1906 (34 Stat. 539). This document shall be known as “the Base Membership Roll.” ONCA 16-16, eff. Dec. 14, 2015.