2. As regards any land which is the subject of an agreement and which is coastal belt, enclosed partially improved grassland, enclosed unimproved grassland, semi-natural rough grazings, wetland or a buffer zone—
(1) the farmer shall not plough, level, reseed, cultivate or, except in the case of enclosed partially improved grassland, use a chain harrow or roller;
(2) the farmer shall not, in the case of enclosed partially improved grassland, use a chain harrow or roller between 31st March and 8th July in any year;
(3) the farmer shall not install any new drainage system nor substantially modify any existing drainage system;
(4) the farmer shall not apply lime or any other substance designed to reduce the acidity of the soil;
(5) subject to sub-paragraph (6) below, the farmer shall not apply any inorganic or organic fertiliser;
(6) the farmer shall, in the case of enclosed partially improved grassland, and subject to sub-paragraph (4) of paragraph 1 of this Schedule, apply not more than 12.5 tonnes of farmyard manure per hectare per year;
(7) the farmer shall not apply fungicides or insecticides;
(8) the farmer shall not apply herbicides except to control bracken (Pteridium aquilinum) , nettles (Urtica dioica) , spear thistle (Cirsium vulgare) , creeping or field thistle (Cirsium arvense) , curled dock (Rumex crispus) , broadleaved dock (Rumex obtusifolius) , ragwort (Senecio jacobaea) and Japanese Knotweed (Reynoutria Japonica) and then only by spot treatment or weed wiper and in the case of bracken (Pteridium aquilinum) by overall spray treatment;
(9) the farmer shall control bracken (Pteridium aquilinum) by mechanical means or by means of asulam or other chemical approved by the Secretary of State;
(10) the farmer shall burn heather, grass and scrub only in accordance with a programme agreed in advance with the Secretary of State;
(11) the farmer shall not increase existing stocking levels of cattle and sheep without the prior written approval of the Secretary of State;
(12) the farmer shall not graze the land with cattle or sheep at a stocking rate that causes overgrazing or poaching, but—
(a)as regards unenclosed semi-natural rough grazings which do not include heather, he shall not in any event graze with cattle or sheep at an average annual stocking rate exceeding 0.45 livestock units per hectare, and
(b)as regards unenclosed semi-natural rough grazings which include heather, he shall not in any event graze with cattle or sheep at an average annual stocking rate exceeding 0.22 livestock units per hectare;
(13) the farmer shall restrict supplementary feeding of livestock to areas agreed in advance with the Secretary of State.