After Independence, the first Constituent Assembly of Pakistan, elected in December 1945 in united India, was assigned the task of framing the Constitution of Pakistan. This Assembly passed the Objectives Resolution on 12th March, 1949, laying down principles which later became substantive part of the Constitution of Pakistan and still serves as its preamble. However, before it could accomplish the task of framing the constitution, the assembly was dissolved in October, 1954. Thereafter, the Governor General, convened the Second Constituent Assembly in May, 1955, which framed and passed the first Constitution of Pakistan on 29th February, 1956. That Constitution was promulgated on 23rd March 1956, which provided for a parliamentary form of Government with a unicameral legislature. However, from 14th August 1947 to 1st March 1956 the Government of India Act, 1935, was retained as the Constitution of Pakistan. Read More.