Actually, the second presidential election was intended to be held after Indonesia's independence.
In addition, due to the change of the 1945 Constitution to the Provisional Constitution of 1950 (which was used from 1950 to 1959), the presidential election could not be held because the president at that time was only the holder of state power, not also the holder of government.
Sukarno was finally proposed to be nominated at the MPRS General Session dated 15–22 May 1963.
Many of Soekarno's supporters proposed Sukarno's nomination as president for life.
Sukarno was officially made President for Life through the session.