Following these events, further constitutional reforms were enacted to create a unicameral 54-member House of Assembly elected by proportional representation (53 members elected in a single nationwide constituency and a Speaker elected by MPs). The first elections held under the new system took place in 1964, and although the PPP again emerged as the largest party, the PNC was able to form a coalition government with the United Force, which together held 29 seats. Despite losing the elections Jagan refused to resign as Prime Minister, and had to be removed by Governor Richard Luyt, with Burnham replacing him.