2.—(1) In these Regulations—
“coastal waters” means any tidal waters which are within the area which extends landward from the baselines from which the breadth of the territorial sea adjacent to Northern Ireland is measured as far as the fresh-water limit of any waterway;
“inland freshwaters” means that part of any waterway above the freshwater limit; and
“relevant territorial waters” means the waters which extend seaward for 3 miles from the baselines from which the breadth of the territorial sea adjacent to Northern Ireland is measured.