The responsibility for clearing highway litter and sweeping carriageways is governed by the Environmental Protection Act (1990); Section 89(1) places a duty on National Highways to ensure that the motorways and some trunk roads, so far as is practicable, is kept clear of litter and refuse. The relevant district or Local Authority manages litter collection on the rest of the roads in England. The Department and the Highways Monitor challenge National Highways on litter performance. National Highways is committed to reporting annually on the percentage of the Strategic Road Network which is predominately free of litter, refuse or detritus apart from some small items, in line with the Code of practice on litter and refuse published by Department for Environment, Food and Rural Affairs. National Highways does not have litter enforcement powers on the strategic road network, Local Authorities do have the powers to take forward civil and criminal prosecutions if they have sufficient evidence to do so.