The Hong Kong Police Force (HKPF) is the primary law enforcement, investigative agency, and largest disciplined service under the Security Bureau of Hong Kong. The Royal Hong Kong Police Force (RHKPF) reverted to its former name after the transfer of sovereignty of Hong Kong from the United Kingdom to People's Republic of China in 1997. Pursuant to the one country, two systems principle, the HKPF is officially independent of the jurisdiction of the Ministry of Public Security of the People's Republic of China, which under usual circumstances may not interfere with Hong Kong’s local law enforcement matters. All HKPF officers are employed as civil servants and therefore required to pledge allegiance to the Hong Kong Basic Law. The HKPF consists of approximately 34,000 officers, including the Hong Kong Auxiliary Police Force, civil servants, and its Marine Region (3,000 officers and 143 vessels as of 2009). History A police force has been serving Hong Kong since shortly after the island was established as a colony in 1841. On 30 April 1841, 12 weeks after the British landed in Hong Kong, Captain Charles Elliot established a policing authority in the new colony, empowering Captain William Caine to enforce Qing law in respect of local inhabitants and "British Police Law" for "non-natives". By October 1842, an organised police force (still under the direction of Caine who was also Chief Magistrate) was routinely bringing criminals before the courts for trial. Caine's role as head of the police force ended when its first Superintendent was appointed on 22 February 1844, Captain Haly of the 41st Madras Native Infantry. The formal establishment of the force was gazetted on 1 May 1844. During World War II, Japan occupied Hong Kong, and the Hong Kong Police Force was temporarily disbanded. The 1950s saw the commencement of Hong Kong's 40-year rise to global prominence, during which time the Hong Kong Police tackled many issues that have challenged Hong Kong's stability. Between 1949 and 1989, Hong Kong experienced several huge waves of immigration from mainland China, most notably 1958–62. In the 1970s and 1980s, large numbers of Vietnamese boat people arrived in Hong Kong, posing challenges first for marine police, secondly for officers who manned the dozens of camps in the territory and lastly for those who had to repatriate them. The force was granted the use of the title ‘royal’ in 1969 for its handling of the Hong Kong