The Government of the Hong Kong Special Administrative Region, commonly known as the Hong Kong Government or HKSAR Government, refers to the executive authorities of Hong Kong SAR. It was formed on 1 July 1997 in accordance with the Sino-British Joint Declaration of 1983, an international treaty lodged at the United Nations. This government replaced the former British Hong Kong Government (1842–1997). The Chief Executive and the principal officials, nominated by the chief executive, are appointed by the State Council of the People's Republic of China. The Government Secretariat is headed by the Chief Secretary of Hong Kong, who is the most senior principal official of the Government. The Chief Secretary and the other secretaries jointly oversee the administration of Hong Kong, give advice