The composition and powers of the Senate were established by Section Two of the Constitution of the United States of Indonesia (RUSI).

Most of the members that left the senate were local monarchs who had to serve in their respective kingdom (Muhammad Kaharuddin III and Sujadi).

In its first article, the constitution stated that the sovereignty of Indonesia shall be implemented together with the People's Representative Council and the Senate.

[2] Based on the constitution, on 16 February 1950, the Senate of the United States of Indonesia was formed, and its members were sworn in on the same day.

Two senators, Raden Hanan and Anang Abdul Rivai were installed on 20 February 1950 and 5 March 1950.