This Statutory Guidance for Police Collaboration is published to assist chief officers and policing bodies when considering and implementing collaborative working as a means to achieving more efficient and effective delivery of policing services. It includes clarification of the relevant legislation that governs collaboration in the police service, in particular of sections 22A to 23I of the Police Act 1996 (referred to as “the Act” for the remainder of this document) which set out the provisions under which collaboration agreements may be made by police forces and policing bodies. These legal provisions were amended and expanded by the Policing and Crime Act 2009 and the Police Reform and Social Responsibility Act 2011.
The document is here:
https://www.gov.uk/government/publications/statutory-guidance-for-police-collaboration