Community RASU Road and Armed Support Unit / CHIS Covert Human Intelligence Source CIA Community Impact Assessment CIFEx Centre for Information / Chief Police officers ACPOS Association of Chief Police officers / CPU Close Protection Unit / Understanding MSTU Medical Support Training Unit / Terms Abbreviations and Acronyms ACPO Association / Human Rights ECtHR European Court / Defence Police MOD Ministry of Defence MOE Method of Entry MOU Memorandum / APP Authorised Professional Practice ARV Armed Response Vehicle ATO Ammunition Technical Officer CAA Civil Aviation Authority CAST Home Office Centre for Applied Science / of Contact STRA Strategic Threat and Risk Assessment UCMC Urban Contact Management Centre / Contact STRA Strategic Threat and Risk Assessment UCMC Urban Contact Management Centre / CMDU Conflict Management Development Unit / Violent Direct Action PACE Police / Surveillance MDP Ministry / /