This document compares Pakistan's constitutions of 1956 and 1962. It finds that the 1962 constitution introduced a presidential system while the 1956 constitution implemented a parliamentary system. Some key differences included: the 1962 constitution established referendums and indirect elections, while the 1956 constitution did not include referendums and used direct elections. The 1962 constitution also created new Islamic institutions and a Supreme Judicial Council that were absent in the 1956 constitution. Overall, the constitutions differed in their forms of government but shared some similarities as well.