Changes made by Psychoactive Substances Act 2016 (Consequential Amendments) 2016
S.I. 2016/554
Made to Visiting Forces and International Headquarters (Application of Law) 1999
1 change. All changes made by Psychoactive Substances Act 2016 (Consequential Amendments) 2016
From legislation.gov.uk's record of changes, the official one: see it there.