Home2023 Treaties and Agreements ...Switzerland (23-616) – Agreement on Enhancing Cooperation in Preventing and Combating Serious Crime hide Switzerland (23-616) – Agreement on Enhancing Cooperation in Preventing and Combating Serious Crime TIAS Office of Treaty Affairs June 16, 2023 Law Enforcement: Cooperation Signed at Washington December 12, 2012; entered into force June 16, 2023. With Annex. Download Agreement [9 MB] Tags Law Enforcement Switzerland Treaties