3.—(1) No meteorological station lattice tower may exceed a height of 315 metres above HAT.
(2) Meteorological mast foundation structures must be of 1 or more of the following foundation options: monopole, multi-leg, gravity base or floating structure secured by chain and anchor.
(3) No meteorological mast foundation structure employing a footing of driven piles may—
(a)have more than 4 driven piles;
(b)in the case of single-pile structures, have a pile diameter exceeding 10 metres or employ a hammer energy during installation exceeding 2,300 kilojoules;
(c)in the case of structures with 2 or more piles, have a pile diameter exceeding 3.5 metres or employ a hammer energy during installation exceeding 1,900 kilojoules.
(4) No meteorological mast foundation may have—
(a)a seabed footprint (excluding subsea scour protection) exceeding 1,735 square metres;
(b)a seabed footprint (including subsea scour protection) exceeding 4,657 square metres;
(c)a main supporting structure exceeding 51.5 metres in width.