Article 3
The area of sea below high water springs enclosed by a line starting at a point on the north east coast of Lewis at 58°30'N 6°13.4'W; then east to a point on the mainland of Scotland at 58°30'N 5°07.2'W; then south along the western mainland shore to a point north of Stoerhead at 58°15'N 5°23.5'W; then west to a point on the east coast of Lewis at 58°15'N 6°09'W; then north along the eastern shore of Lewis to the start point.