He was a deputy speaker of the Provisional People's Representative Council between 1950 and 1956, and chaired the legislature of the State of East Indonesia (NIT).

[2] He began his term as a member of the Nationalist faction led by Mohammad Husni Thamrin called the Fractie National, but only a few months later in the summer of 1939 he left it and joined a breakaway Sumatran group called the Indonesisch nationalistische groep, which was chaired by Mangaradja Soeangkoepon.

The proposals were quickly rejected by the Japanese, who soon prohibited displays of Indonesian nationalism to the disappointment of prior collaborators.

[11][12] After his loss, Noor ran as chairman of the new state's legislature, this time defeating Ambonese KNIL captain Julius Tahija 40–25.

[17] Noor was an adviser to the Indonesian delegation during negotiations on board the Renville, and he was arrested by Dutch authorities following Operation Kraai,[1] though by the time of the Roem–Van Roijen Agreement's signing, he was already organizing a welcome ceremony for the return of the republican government to Yogyakarta.

[1] By 1950, following the Dutch–Indonesian Round Table Conference and the formation of the United States of Indonesia, Noor became a senator, representing the Southeast Borneo Federation.

[23] In April 1959, Noor replaced Hazairin in the Constitutional Assembly of Indonesia, and held a seat there until the body's dismissal by Sukarno on 5 July 1959.