“For how many years was the 1962 Constitution of Pakistan effective?”

"The 1962 Constitution of Pakistan introduced under President Ayub Khan remained in effect for 7 years from 1962 to 1969. It established a presidential system centralizing power and replacing the 1956 parliamentary framework. The constitution faced criticism for limiting democratic freedoms leading to political unrest. Its abrogation in 1969 followed widespread protests and martial law. The brief tenure of this constitution reflects the challenges of balancing governance and political stability in Pakistan’s early decades shaping subsequent constitutional developments."