The Basic Law (BL) is the constitutional document of the Hong Kong Special Administrative Region (HKSAR). Put into effect on July 1, 1997, it enshrines within a legal document the important concept of “One Country, Two Systems".
Q: Is Hong Kong a free port and a separate customs territory?
A: The HKSAR is a separate customs territory. The HKSAR, using the name “Hong Kong, China”, is a member in its own right of the World Trade Organisation and the World Customs Organisation. Ships of all nations enjoy access to the ports of the HKSAR, which is a free port, in accordance with the laws of the Region. Export quotas, tariff preferences and other similar arrangements, which are obtained or made by the HKSAR or which were obtained or made and remain valid, shall be enjoyed exclusively by Hong Kong. (BL Articles 114; 116; 126)