Legal Basis
Legal Basis in Switzerland
The relevant Swiss decrees:
Sanction/embargo laws (country-specific and person-specific, only available in German, French and Italian)
Goods Control Ordinance (GCO) (includes the dual-use goods lists)
Safeguards Ordinance (SaO) (application of safeguards within the framework of the Treaty on the Non-Proliferation of Nuclear Weapons)
Chemicals Control Ordinance (ChKV) (only available in German, French and Italian)
Ordinance on the Export and Brokerage of Goods for Internet and Mobile Monitoring (VIM) (only available in German, French and Italian)
Selected Foreign Legal Bases and Authorities
USA:
Sanctions Programs and Country Information
Export Administration Regulation (EAR) administrated by BIS
EU:
Consolidated list of persons, groups and entities subject to EU financial sanctions
It should be noted that although the regulations are binding for all EU countries, there may still be national differences.
UK
Guidance: Trade sanctions, arms embargoes, and other trade restrictions