art 3 Definition of Estuary Limits
(1) For the purposes of this Order “estuary limits” means the limits which divide each river including its mouth or estuary from the sea. (2) The estuary limits of a river shall be the limits fixed and defined— (a) in relation to the Tweed, by paragraphs (3) and (4); and (b) in relation to other rivers in the district, by an estuary limits order made under paragraph (5), and, where no such limits are fixed for a river as provided for in this article, the estuary limits of a river shall be the natural limits which divide a river (including its mouth or estuary) from the sea. (3) The coastal limits of the estuary of the Tweed are, in the north, high water mark on the boundary between Scotland and England and, in the south, grid reference NU 0483246702. (4) The estuary limits of the Tweed (which may be referred to as “the Mouth of the Tweed”) are formed by— (a) in the north, the line described in article 2(6)(c) ; (b) in the south, a line running from grid reference NU 0483246702, parallel to the line described in article 2(6)(b) , and extending seaward to the line described in article 2(6)(d) ; and (c) in the east, the straight line between the seaward ends of the lines described in sub—paragraphs (a) and (b). (5) The Scottish Ministers may, in relation to any other river in the Tweed district, and whether or not any such limits have previously been fixed, by order (in this Order referred to as an “estuary limits order”) prescribe estuary limits for that river. (6) Paragraphs 1, 2 and 8 to 14 of Schedule 2 shall have effect in relation to the making of an estuary limits order. (7) Where the estuary limits of any river have been fixed, after consulting the Commission, the Scottish Ministers may, by order, change a reference used in describing estuary limits where the suitability of that reference for that purpose has lessened or ceased; but such an order shall not be an estuary limits order.