known as a 'Complex' where majority of operations in the area start. The LSA then have smaller community police stations for quick policing access. Metropolitan districts and LSAs are divided into the Metropolitan Operations Service and the State Operations Service, which each have their own coordination branch and some other additional functions. Metropolitan Districts (Metropolitan Operations Service) Eastern District Northern District Southern District Western District Metropolitan Operations Service Coordination Branch Public Transport Safety Section Local Service Areas (State Operations Service) Barossa LSA Eyre and Western LSA Far North LSA Hills Fleurieu LSA Limestone Coast LSA Murray Mallee LSA Yorke Mid North LSA State Operations Service Coordination Branch State Tactical Response Group Traffic Services Branch (Highway Patrol) Security and Emergency Management Service Security and Emergency Management is led by an Assistant Commissioner. Security and Emergency Management Service Coordination Branch Communications Group Police Security Services Branch Security Advice Section Special Tasks and Rescue Group (STAR Group) STAR Group Police Tactical Group Dog Operations Unit Mounted Operations Unit Water Operations Unit PolAir Bomb Squad Negotiators Security Response Section State Protective Security Branch (Police Security Officers) Operations Support Service Operations Support is led by an Assistant Commissioner. Operations Support Service Coordination Branch Firearms Branch Forensic Services Branch Licensing Enforcement Branch Prosecution Services Branch State Intelligence Branch Crime Service Crime Service is led by an Assistant Commissioner, usually a former Detective. Serious Crime Coordination Branch Financial and Cybercrime Investigation Branch Investigation Support Branch Major Crime Investigation Branch Public Protection Branch Serious and Organised Crime Branch Governance and Capability Service Governance and Capability is led by an Assistant Commissioner. Governance and Capability Service Coordination Branch Commissioner’s Support Branch Communication and Engagement Branch Ethical and Professional Standards Branch Office of the General Counsel Other services Each administrative service is led by a civilian director. Business Service Information Systems and Technology Service Human Resources Service Ranking and structure Police Officers All grades of constable perform the same basic range of duties, with the rank only reflecting experience. The rank of probationary constable is held for the first fifteen months of service. A constable with one stripe is qualified for promotion to senior constable. A senior constable first class is either an officer qualified for promotion to sergeant/senior sergeant or has won a senior constable first class position on merit. A brevet sergeant is the second in charge of a team and it can be a temporary designation for