Parish councils are run by volunteer councillors who are elected to serve for four years and are not paid. Some councils have chosen to pay their elected members a small allowance as permitted under Part 5 of the Local Government Act 2000 The Local Authorities (Members’ Allowances) (England) Regulations 2003. The number of councillors varies roughly in proportion to the population of the parish. Most parish councillors are elected to represent the entire parish, though in parishes with larger populations or those that cover large areas, the parish can be divided into wards. These wards then return a certain number of councillors each to the parish council (depending on their population). Only if there are more candidates standing for election than there are seats on the council will an election be held. However, sometimes there are fewer candidates than seats. When this happens, the vacant seats have to be filled by co-option by the council. When a vacancy arises for a seat mid-term, an election is only held if a certain number (usually 10) of parish residents request an election. Otherwise the council will co-opt someone to be the replacement councillor. Every Parish Council in England must adopt a code of conduct, and parish councillors must comply with its standards, enforced by the Standards Board for England.