Developing countries GSP (Generalized System of Preferences)

The linked page below will provide you with information on the topic:

https://bazg.admin.ch/content/bazg/en/home/informationen-firmen/einfuhr-in-die-schweiz/steuern-und-abgaben_einfuhr/zoelle/entwicklungslaender-gsp_generalized-system-of-preferences.html