The new Osage Nation Government is made of three branches, Executive, Legislative and Judicial. The supreme executive power of the Osage Nation is vested in a Principal Chief who shall dutifully support the Constitution and laws of the Osage Nation and shall see that the laws are faithfully executed, administered and enforced. There shall be an Assistant Principal Chief, who shall have the same qualifications as the Principal Chief and serve for the same term and in the same manner. All other administrative offices, departments, agencies and instrumentalities of the Osage Nation including, but not limited to, public trusts, boards, village committees, authorities and committees are also included in the executive branch.
The legislative branch is made up of the Osage Nation Congress. This consists of twelve elected representatives. These representatives serve staggered, 4 year terms. The presence of at least two-thirds of the whole number of representatives is necessary t constitute a meeting of the congressional house for the exercise of its powers. They shall convene twice annually in a regular session.
The Judicial powers of the Osage Nation are vested in one Supreme Court, in a lower Trial Court and in such inferior Courts as the Osage Nation Congress may ordain and establish for the development, maintenance and administration of the Tribal Justice System.