(1) Subject to the provisions of paragraphs (2) and (3) of this article, for the purposes of the Act, those parts of the Port of Swansea and the Port of Port Talbot which are situated within the area bounded by –
(a) an imaginary straight line drawn from Mumbles Point in the Port of Swansea to the south eastern extremity of the Port of Port Talbot at Nash Point at latitude 51° 24'11" north, longitude 03° 33'39" west; and
(b) the mean high water line along the coast between the points described in (a) above together with –
(i) docks and harbours, including the approaches thereto; and the whole of any wharf and the area within the gates or curtilage of any dock and the buildings or part of any building thereon used in connection with maritime trade or business; and
(ii) as far as the tide flows, all rivers, canals, bays, creeks, streams, channels, waters and watercourses;
shall be a port health district and a joint board shall be the port health authority for that district.
(2) There shall be excluded from the port health district –
(a) all land in the Port of Swansea lying –
(i) to the north of an imaginary line drawn from the junction of Kings Road and Langdon Road along the northern side of the Prince of Wales Dock to its intersection with an un-named road leading from Fabians Way and then due south to the Kings Dock and then the east along the northern side of the Kings Dock;
(ii) to the north of an imaginary line drawn from the north east corner of the Kings Dock in an east-south-easterly direction to its intersection with an un-named road leading to Fabians Way and thence eastwards along the southern boundary of that road to its junction with Fabians Way;
(iii) to the west of an imaginary line drawn from the junction of Kings Road and Langdon Road along the south-western side of the Prince of Wales Dock and then south to a point on the east bank of the River Tawe at grid reference SS6655 9265;
(iv) to the west of the River Tawe and north of an imaginary line drawn from the east bank of the river at grid reference SS6655 9265 to the west bank of the river at grid reference SS6643 9256;
and
(b) all waters of the River Tawe (whether tidal or otherwise) including all rivers, canals, creeks, streams, channels, watercourses, docks, harbours and marinas entering or connected to the River Tawe and north of an imaginary line drawn from the east bank of the river at grid reference SS6655 9265 to the west bank of the river at grid reference SS6643 9256.
(3) The joint board shall be called the Swansea Bay Port Health Authority and shall consist of 19 members of whom 10 shall be appointed by Swansea City Council, 3 by Neath Borough Council, 3 by Port Talbot Borough Council, 2 by Ogwr Borough Council and 1 by Vale of Glamorgan Borough Council from members of their respective Councils.