Uniform Title Convention Between the United States of America and Switzerland for the Avoidance of Double Taxation with Respect to Taxes on Income (1996 October 2). Protocols, etc. (2009 September 23) Title Taxation : double income : protocol between the United States of America and Switzerland amending the Convention of October 2, 1996, signed at Washington, September 23, 2009 ; entered into force September 20, 2019 with exchanges of notes, 2019.