in response to a Communist uprising and guerrilla war. The regulations allowed the police to arrest anybody suspected of having acted or being likely to act in a way that would threaten security without evidence or a warrant, hold them incommunicado for investigation, and detain them indefinitely without the detainee ever being charged with a crime or tried in a court of law. The successor to the Emergency Regulations Ordinance, the Preservation of Public Security Ordinance 1955 ("PPSO"), was introduced a result of the 1955 Hock Lee bus riots by the Labour Party government in Singapore. There was strong opposition to the PPSO by the party then in opposition, the People's Action Party ("PAP"). In 1958, Lee Kuan Yew of the PAP accused the Lim Yew Hock government of using the PPSO to stifle political dissent. In 1960, three years after Malaya's independence, the Emergency was declared over. However, the Malayan Internal Security Act 1960 ("ISA") was passed in place of the PPSO with much of the same powers. During parliamentary debates on the Act, Malayan Prime Minister Tunku Abdul Rahman stated that the ISA would only be applied against only the remaining Communist insurgents. The Malayan Communist Party and its insurgents eventually surrendered in 1989. Nonetheless, the ISA was retained in Malaysia. The drafter of the Malayan ISA was Hugh Hickling, a British lawyer, author and professor. In 1989, he commented that he "could not imagine then that the time would come when the power of detention, carefully and deliberately interlocked with Article 149 of the Constitution, would be used against political opponents, welfare workers and others dedicated to nonviolent, peaceful activities". Nonetheless, he commented that he supported review of the ISA but it was not for him to say if the law should be scrapped, as "you've got a multi-racial society [in Malaysia] in which emotions can run high very quickly". When Singapore joined the Federation of Malaya in 1963, the Malayan ISA was extended to Singapore. The Act was retained in Singapore even after its separation from Malaysia in 1965. The current version of the Act is known as Chapter 143 of the 1985 Revised Edition. In September 2011, the debate over whether the ISA should be retained was re-opened after Malaysia announced that it was considering repealing the ISA. Prime Minister Najib Razak stated that the Act would be abolished and replaced by new laws to