Sea-Fisheries and Maritime Jurisdiction Act 2006
85.— (1) Save as otherwise provided, the baseline is low-water mark—
( a) on the coast of the mainland or of any island, or
( b) on any low-tide elevation situated wholly or partly at a distance not exceeding 12 nautical miles from the mainland or an island.
(2) The Government may by order (which they may by order revoke or amend) prescribe straight baselines in relation to any part of the State and the closing line of any bay or mouth of a river, and any line so prescribed shall be taken as the baseline.
Power pursuant to subs. (2) exercised (16.04.2019) by Maritime Jurisdiction (Bay Closing Lines) Order 2019 (S.I. No. 155 of 2019).
Power pursuant to subs. (2) exercised (1.02.2016) by Maritime Jurisdiction (Straight Baselines) Order 2016 (S.I. No. 22 of 2016), in effect as per art. 2.