British Forces Overseas Hong Kong and rescue operations in times of emergency. Prior to 1990–1991, British Forces (British Army) was responsible for patrolling and enforcing border control between Hong Kong and China. This role was passed on the Hong Kong Police Force years before the handover in 1997. The British forces stationed in Hong Kong were called the "Hong Kong Garrison", which had the following structure: The Governor of Hong Kong, being a representative of the British sovereign, was the Commander-in-Chief of the British Forces in the colony. The Governor was advised by the Commander British Forces in Hong Kong (CBF) on all military actions.
British nationality law and Hong Kong on or after 1983 to a parent settled in Hong Kong are BDTCs. The law also stated that British Citizens or BDTCs by descent could not automatically pass on British nationality to a child born outside the United Kingdom or the dependent territories concerned unless a parent acquired citizenship otherwise than by descent. Negotiation concerning the future of Hong Kong started in the late 1970s between Britain and China. With the signing of the Sino-British Joint Declaration on 19 December 1984, the future of Hong Kong was set, with China to assume sovereignty of the entire territory of Hong Kong