The document compares the constitutions of Pakistan from 1956, 1962, and 1973. It outlines their key differences such as form of government, presidential powers, fundamental rights, and Islamic provisions. The 1956 constitution introduced a parliamentary system while 1962 changed to a presidential system. The 1973 constitution currently implemented a mixed parliamentary/presidential system with two legislative houses, balanced executive powers for the prime minister and president, and protections for fundamental rights and Islamic principles.