and Crime Act 2017 has in effect abolished police traffic wardens allowing police to focus on their core duties. The duties of traffic wardens have been passed to local authority civil enforcement officers (formerly parking attendants) who, under decriminalised parking enforcement, have powers to issue penalty charge notices for breaches of parking laws on highways or in local authority car parks and compel the production of a disabled parking permit (blue badge) for inspection. A similar situation has developed in Scotland with the functions of traffic wardens being taken over by local councils. In many areas parking legislation has been decriminalised and is enforced solely by council-employed parking attendants. Rank as related to officer identification numbers All officers have a unique identification number. These are usually referred to as shoulder or collar numbers, referring to the fact that they were once worn on the uniform collar and later on the epaulettes by constables and sergeants. Uniformed officers in many forces still wear them on the epaulettes, but other forces have badges or other ways of displaying their identification numbers. Kent Police, for instance, refers to its numbers as force numbers and officers wear them on a velcro tab on their stab vest or on a badge attached to their shirt or tunic. Officers in all forces of the rank of inspector or above do not usually wear their numbers. In most forces these identification numbers are simple numbers, with one to five digits. The Metropolitan Police and Police Scotland, as well as a few other forces, use a letter and number system: Metropolitan Police: Sergeant: Borough code and one, two or three digits Constable: Borough code and three or four digits Special constable: Borough code and four digits, usually beginning with the number 5 (8 for traffic/transport or 9 for specialist units) PCSO: Borough code and four digits, the first digit being a 7 Police Scotland: Sergeant and constable: Division letter and three or four digits Special constable: Division letter and four digits, the first digit being a 7 In the Metropolitan Police, the borough code is a two-letter code which follows the digits (but displayed above them on epaulettes). Before the reorganisation into boroughs, each division had a different code, with sergeants having two-digit numbers and constables having three-digit numbers. Rank insignia Badges of rank are usually worn on the epaulettes. However, when in their formal uniform sergeants wear