and type of duty. The main service uniform for state police is khaki. Some cities, such as Kolkata, have white uniforms. Headgear differs by rank and state; officers usually wear a peaked cap, and constables wear berets or sidecaps. Branches such as the Central Bureau of Investigation do not have a uniform; business dress (shirt, tie, blazer, etc.) is worn with a badge. Special-service armed police have tactical uniforms in accordance with their function, and traffic police generally wear a white uniform. Organisation The state police is headed by an IPS officer with the rank of director general of police (DGP), assisted by two (or more) additional directors general of police (ADGs). Other DG rank officers head autonomous bodies not controlled by the DGP, such as the police recruitment board, fire service and police training. State forces are organised into zones, which consist of two (or more) ranges. Important zones are headed by an additional director general of police, and other zones are headed by an inspector-general of police (IG). Ranges consist of several districts. Important ranges are headed by an IG, and other ranges are headed by a DIG. Important districts are headed by a senior superintendent of police (SSP), and other districts are headed by a superintendent of police (SP). If an SSP is heading the district, they are assisted by two (or more) SPs. If an SP is heading the district, they are generally assisted by one or two) SPs. Each district is divided into sub-divisions or circles, under a deputy superintendent of police (DSP). Each sub-division consists of several police stations commanded by an inspector of police, who is assisted by sub-inspectors (SIs) and assistant sub-inspectors (ASIs). In rural areas, a sub-inspector is in charge of a police station; sub-inspectors (and higher) can file a charge sheet in court. District SPs are not empowered as executive magistrates. The district magistrate (DM, an IAS officer) exercises these powers, which include promulgating Section 144 of the Code of Criminal Procedure (CrPC) and issuing arms licenses. Other than the district police forces, there can be various other departments under the state police, such as Criminal Investigation Department (CID), Economic Offences Wing (EOW), Fire department, Telecom, VIP Security, Traffic police, Government Railway Police (GRP), Anti-Corruption Organization, State Armed Police Forces, Anti Terrorism Squad (ATS), Special Task Force (STF), State Crime Records Bureau (SCRB), Forensic Science Laboratory (FSL) etc. Government Railway