Home1991 Treaties and Agreements ...United Kingdom (91-1204) – Agreement on Law Enforcement hide United Kingdom (91-1204) – Agreement on Law Enforcement TIAS Office of Treaty Affairs December 4, 1991 Law Enforcement Agreement signed at Washington and London November 15 and December 4, 1991; entered into force December 4, 1991. Download Agreements [1 MB] Tags Crime Law Enforcement Treaties Treaties and International Agreements United Kingdom