Article 3 Extension of limits of jurisdiction for purposes of pilotage
The limits within which Associated British Ports shall have jurisdiction for the purposes of pilotage under Part I of the Pilotage Act 1987 shall include (in addition to the existing area of jurisdiction) the area the boundaries of which are shown by a continuous red line on the signed plan, being an area of the sea bounded—
on the north, by an imaginary line drawn true east from a point on the level of high water on the parallel of latitude 52°31'5.N until it reaches longitude 1°50'.E;
on the east, by an imaginary line following the said longitude in a southerly direction until it intersects the next mentioned line;
on the south, by an imaginary line drawn true east from a point on the level of highwater on the parallel of latitude 52°26'.1N, until it intersects with the last mentioned line;
on the west, by the level of high water on the boundary of the existing area of jurisdiction as the case may be.