The Territorial Sea of the United States of America By the President of the United States of America A Proclamation of 27 December 1988 states the extension of the territorial sea of the United States of America, 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.
The territorial seas of Solomon Islands comprise all areas of sea having as their innermost limits the
baselines established under the provisions of this section and as their outermost limits a line measured seaward from
those baselines every point of which is at a distance of twelve miles from the nearest point of the baselines.
https://www.un.org/depts/los/LEGISLATIONANDTREATIES/PDFFILES/SLB_1978_A…
The Maritime Zone Notification (M.Z.N. 143.2019.LOS) states that on 28 March 2019, Australia deposited with the Secretary -General, pursuant to article 16, paragraph 2, of the Convention, lists of geographical coordinates of points, concerning the baselines for measuring the breadth of the territorial sea, as contained in the Seas and Submerged Lands (Territorial Sea Baseline) Proclamation 2016.
The lists of geographical coordinates of points are referenced to the World Geodetic System (WGS 84)
The Maritime Zones Act 2013 states that the baseline of the territorial sea of Niue is measured from the low-water mark along the coast of Niue, or where there is a coral reef along any part of the coast of Niue, the low-water mark along the outer edge of the coral reef.
The territorial sea comprises those areas of the sea having, as their inner limits, the baseline and, as their outer limits, a line measured seaward from that baseline, every point of which is distant 12 nautical miles from the nearest point of the baseline.
Title 27 of the Palau National Code as amended by the Act (SIXTH OLBIIL ERA KELULAU) to Amend Chapter 1 of Title 27 of the Palau National Code defines the territorial sea as having a twelve miles’ breadth. The inner boundary of the territorial sea of each island or atoll is the baseline which is defined as a continuous line which encircles an island or atoll.