J. Development on any land during a period not exceeding 28 consecutive days consisting of–
(a)the drilling of boreholes;
(b)the carrying out of seismic surveys; or
(c)the making of other excavations,
for the purpose of mineral exploration, and the provision or assembly on that land or adjoining land of any structure required in connection with any of those operations.
J.1 Development is not permitted by Class J if—
(a)it consists of the drilling of boreholes for petroleum exploration;
(b)any operation would be carried out within 50 metres of any part of an occupied residential building or a building occupied as a hospital or school;
(c)any operation would be carried out within a National Park, an area of outstanding natural beauty, a site of archaeological interest or a site of special scientific interest;
(d)any explosive charge of more than 1 kilogram would be used;
(e)any excavation referred to in Class J(c) would exceed 10 metres in depth or 12 square metres in surface area;
(f)in the case described in Class J(c) more than 10 excavations would, as a result, be made within any area of 1 hectare within the land during any period of 24 months; or
(g)any structure assembled or provided would exceed 12 metres in height, or, where the structure would be within 3 kilometres of the perimeter of an aerodrome, 3 metres in height.
J.2 Development is permitted by Class J subject to the following conditions—
(a)no operations are carried out between 6.00pm and 7.00am;
(b)no trees on the land are removed, felled, lopped or topped and no other thing is done on the land likely to harm or damage any trees, unless the mineral planning authority(1) have so agreed in writing;
(c)before any excavation (other than a borehole) is made, any topsoil and any subsoil is separately removed from the land to be excavated and stored separately from other excavated material and from each other;
(d)within a period of 28 days from the cessation of operations unless the mineral planning authority have agreed otherwise in writing—
(i)any structure permitted by Class J and any waste material arising from other development so permitted is removed from the land;
(ii)any borehole is adequately sealed;
(iii)any other excavation is filled with material from the site;
(iv)the surface of the land on which any operations have been carried out is levelled and any topsoil replaced as the uppermost layer, and
(v)the land is, so far as is practicable, restored to its condition before the development took place, including the carrying out of any necessary seeding and replanting.
See section 1(4) of the Act.