Guam and Commonwealth of the Northern Mariana Islands (24 Nautical Mile)

The Contiguous Zone of the United States - Proclamation by the President of the United States of America, 2 September 1999 proclaims the extension of the contiguous zone of the United States of America, including the Commonwealth of Puerto Rico, Guam, American Samoa, the United States Virgin Islands, the Commonwealth of the Northern Mariana Islands, and any other territory or possession over which the United States exercises sovereignty, as follows: The contiguous zone of the United States extends to 24 nautical miles from the baselines of the United States determined in accordance with international law, but in no case within the territorial sea of another nation. In accordance with international law, reflected in the applicable provisions of the 1982 Convention on the Law of the Sea, within the contiguous zone of the United States the ships and aircraft of all countries enjoy the high seas freedoms of navigation and overflight and the laying of submarine cables and pipelines, and other internationally lawful uses of the sea related to those freedoms, such as those associated with the operation of ships, aircraft, and submarine cables and pipelines, and compatible with the other provisions of international law reflected in the 1982 Convention on the Law of the Sea.

https://www.un.org/depts/los/LEGISLATIONANDTREATIES/PDFFILES/USA_1999_P…