The Police and Criminal Evidence Act 1984 (Codes of Practice) (Revision of Codes C, D and H) Order 2017 came into effect on 27 February 2017. The Order brought into force three revised codes of practice under the Police and Criminal Evidence Act 1984 (“PACE”), which supersede the pre-existing Codes of Practice. The revisions to Code C and Code H implement amendments to PACE made by the Criminal Justice and Courts Act 2015 (“CJCA”), which defines a “juvenile” for the purpose of detention as a person who is under the age of 18, rather than under the age of 17. This now requires a 17 year-old to be treated as would be a 16 year-old rather than an adult of 18 years or over.