Book One: 4 General Provisions
Part One: Felonies and Misdemeanours Title One: Scope of Application
Title One: Scope of Application
Art. 3
3 If the person concerned has been prosecuted in a foreign country at the request of the Swiss authorities, then unless the offence involves a gross violation of the principles of the Federal Constitution or the Convention from 4 November 19505 for the protection of Human Rights and Fundamental Freedoms (ECHR), he is not prosecuted in Switzerland for the same offence if :
a. the foreign court has acquitted him and the judgment has taken full legal effect ;
b. the penalty to which he had been sentenced in the foreign country has been served, suspended or has prescribed.
EDIT.