Statutory Rules of Northern Ireland

(a) development not above ground level required in connection with the provision, improvement, maintenance or repair of a sewer, outfall pipe, sludge main or associated apparatus;

(b) development not above ground level required in connection with the supply of water or for conserving, redistributing or augmenting water resources, or for the conveyance of water treatment sludge;

(c) development in, on or under any watercourse and required in connection with the improvement or maintenance of that watercourse;

(d) the provision of a building, plant, machinery or apparatus in, on, over or under land for the purpose of survey or investigation;

(e) the maintenance, improvement or repair of works for measuring the flow in any watercourse or channel;

(f) the installation in a water distribution system of a booster station, valve house, meter or switch-gear house;

(g) any works authorised under Article 141 (works under drought orders) or Articles 219 and 220 (pipe laying) of the Water and Sewerage Services (Northern Ireland) Order 2006[3];

(h) any other development in, on, over or under operational land, other than the provision of a building but including the extension or alteration of a building; or

(i) the strapping of pipelines to bridges.

(i) its design or external appearance would be materially affected;

(ii) the height of the original building would be exceeded, or the cubic content of the original building would be exceeded by more than 25% ; or

(iii) the floor space of the original building would be exceeded by more than 1000 square metres;

(d) in the case of any Class H(h) development, it would consist of the installation or erection of any plant or machinery exceeding 15 metres in height or the height of anything it replaces, whichever is the greater; or

(e) the land is within a site of archaeological interest.

"associated apparatus", in relation to any sewer, main or pipe, means pumps, machinery or apparatus associated with the relevant sewer, main or pipe;

"sludge main" means a pipe or system of pipes (together with any pumps or other machinery or apparatus associated with it) for the conveyance of the residue of water or sewage treated in a water or sewage treatment works as the case may be, including final effluent or the products of the dewatering or incineration of such residue, or partly for any of those purposes and partly for the conveyance of trade effluent or its residue."