The Heather Moorland (Livestock Extensification) (Scotland) Regulations 1995

2.  As regards other land comprised in a participating production unit or common grazing—

(a) the beneficiary shall not damage, destroy or remove stockproof walls, hedges, traditional weatherproof farm buildings, features of historical or archaeological interest or value, lochs, ponds, streams or other watercourses;

(b) the beneficiary shall not damage or destroy any areas of herb rich grassland, wetlands, native or semi-natural woodland, field and hedgerow trees, or other areas of high conservation value. The beneficiary may, however, apply herbicides to control bracken, spear thistle, creeping or field thistle, curled dock, broadleaved dock, or ragwort but herbicides used for these purposes shall be applied by means of weed wiper or spot treatment, hand spraying, tractor mounted sprayers or, with the prior written consent of the Secretary of State, by other methods and other plants may also be controlled with the prior written consent of the Secretary of State;

(c) the beneficiary shall not graze any land with livestock in such numbers as to adversely affect to a significant degree, the growth, quality or species composition natural or semi-natural vegetation on that land.