On 17 February 1960, President Ayub Khan appointed a commission under Muhammad Shahabuddin, the Chief Justice of Pakistan, to report a political framework for the country. The commission submitted its report on 29 April 1961, and on the basis of this report, a new constitution was framed on 1 March 1962. The new constitution, declaring the country as Republic of Pakistan, brought about a presidential system of government, as opposed to the parliamentary system of government under the 1956 Constitution. The electoral system was made indirect, and the "basic democrats" were declared electoral college for the purpose of electing members of the National and Provincial Assemblies. Under the new system, presidential election were held on 2 January 1965 which resulted in a victory for Ayub Khan. As years went by, political opposition against President Ayub Khan mounted. In East Pakistan, leader of the Awami League, Sheikh Mujibur Rahman, was one of the key leaders to rally opposition to President Ayub Khan. In 1966, he began the Six point movement for East Pakistani autonomy.