Article 3
The area of sea below high water springs enclosed by a line starting at a point on the east coast of Lewis at 58°15'N 6°09'W; then east to a point at 58°15'N 6°0 0'W; then south to a point at 57° 45'N 6°00'W; then west to a point at 57°45'N 6°30'W; then south to a point on the west coast of Skye at 57°31.5'N 6°30'W; then north and west along the west shore of Skye to a point at 58°30'N 6°45'W; then west to a point at 57°30'N 7°00'W; then north to a point on the south coast of South Harris at 57°45'N 7°00'W; then north along the east coasts of South Harris, North Harris and Lewis back to the start point.
The area of sea below low water springs enclosed by a line starting from a point at 57°50.103'N 05°36.460'W, then north-east to 57°50.145'N 05°36.392'W, then north-west to 57°50.270'N 05°36.662'W,then south-west to 57°50.220'N 05°36.735'W, then south-east to 57°50.164'N 05°36.570'W, then east to 57°50.167'N 05°36.508'W, then south to 57°50.129'N 05°36.500'W, then south-east to the start point.