Paragraph 5 As regards any semi-natural rough grazings or enclosed coastal belt which is the subject of an agreement and where heather forms at least 5 per cent but not more than 50 per cent of the vegetation cover—

the farmer shall graze with cattle or sheep at an average annual stocking rate not exceeding 0.15 livestock units per hectare;

the farmer shall, between 31st August in any year and 1st April in the following year, graze with cattle or sheep at an average annual stocking rate not exceeding 0.10 livestock units per hectare.