High School, eventually escalating into riots. Under the support of Black, the riot police were dispatched by Lim to clear the school grounds. The Government also imposed a curfew from 26 October to 2 November, suppressing the riots effectively. However, the riots killed 13 and injured hundred more in the five days. Hundreds were arrested, including assemblymen Lim Chin Siong, Fong Swee Suan and Devan Nair, who were radicals from the opposition PAP. They were released when the PAP came to power in 1959. Negotiation for self-rule British Government was assured of Singapore's internal security due to Lim's tough stance against the communists. This allowed re-negotiations for self-rule from December 1956 to June 1958. Under Lim's leadership, a delegation of representatives from various political parties headed to London in March 1957 to commence talks with the British for self-rule. They reached a consensus in April, while Lim signed a new constitutional agreement with Secretary of State for the Colonies Alan Lennox-Boyd on behalf of Singapore. Representatives from Singapore drafted a new constitution; In August 1958, the British Parliament passed the State of Singapore Act, 1958. Based on the agreement, there would be a great increase in the number of Legislative Assembly seats to be contested in the 1959 election, where all seats would be popularly elected; Singapore would become a self-governing state, with the Chief Minister and the Council of Ministers being replaced respectively by the Prime Minister and the Cabinet of Singapore, in charge of all affairs except defence and diplomacy; The Yang di-Pertuan Negara would replace the existing Governor. Meanwhile, Lim prompted the Assembly in October 1957 to pass the Singapore Citizenship Ordinance, 1957. The Ordinance defined Singapore citizens as those who were born in Singapore, who were born outside Singapore whose fathers were born in Singapore and did not hold foreign nationality, who were born in Malaya and had been living in Singapore for at least two years, who were citizens of the United Kingdom and Colonies living in Singapore for at least two years, and who were foreigners living in Singapore for at least ten years. In recognition of his performance, the University of Malaya conferred Lim the Honorary Doctor of Laws degree in September 1957, while he was presented the rank of Seri Maharaja Mangku Negara (S.M.N) in August 1958 by Malaysian King Tuanku Abdul Rahman, therefore being granted the title of Tun. Acknowledging Nanyang