Elsewhere there are two types of "taxi"—hackney carriages (licenced under the Town Police Clauses Act 1847), which may pick up fares on the street or be pre-booked and have a meter that charges a rate set by the local authority (alternatively the driver may negotiate a lower fare with the customer), and private hire vehicles (licenced under the Local Government (Miscellaneous Provisions) Act 1976) which must be pre-booked and whose rates are set by the private hire operator. Hackney carriages may only pick up fares off the street in the area in which they are licenced—however, they and private hire vehicles may pick up anywhere in the UK as long as they are pre-booked, and the driver, vehicle and operator are all licenced in the same borough. Some authorities have entered into agreements with neighbouring authorities to deputise each other's enforcement officers so they have the power to apprehend "trespassing" taxis from outside their area.