 The Park Authority receives 80 % of its funding as a direct grant from the government . The Park Authority Committee consists of members from parish and county councils , and six appointed by the Secretary of State . The work is carried out by 80 staff including rangers , volunteers and a team of estate workers who carry out a wide range of tasks including maintaining the many miles of rights of way , hedge laying , fencing , <unk> , walling , invasive weed control and habitat management on National Park Authority land . There are ongoing debates between the authority and farmers over the biological monitoring of SSSIs , showing the need for a controlled regime of grazing and burning ; farmers claim that these regimes are not practical or effective in the long term . 
