In 1954, the Constituent Assembly made legislative attempts to try changing the 1935 act to establish checks and balances on the Governor-General's powers. In response, Muhammad again dismissed the Constituent Assembly, an action that was challenged in the Sindh High Court by Maulvi Tamizuddin, the Speaker of the Assembly. The Sindh High Court's Chief Justice Sir George Constantine ruled the Governor-General's decision illegal, but the ruling was overturned by Supreme Court of Pakistan, led by Chief Justice Muhammad Munir, in a split decision.