This Order brings into force two revised codes of practice under section 66(1)(b) of the Police and Criminal Evidence Act 1984 (c. 60). These revised codes of practice supersede the corresponding existing codes of practice. The revised codes C and H relate to the detention, treatment and questioning of persons in police custody.
Link: The Police and Criminal Evidence Act 1984 (Codes of Practice) (Revision of Codes C and H) Order 2019
Source: Legislation .gov.uk