Swiss citizenship is regulated by the 1952 Federal law on Swiss nationality. The acquisition of citizenship is mainly based upon the principle of ius sanguinis and the triple citizenship level, since Swiss nationals are citizenship of their municipality, their canton and the Swiss Confederation. Swiss nationality is granted to a newborn upon birth if at least one of the parents is a Swiss national, irrespective of the place of birth. Swiss citizenship can also be acquired through naturalisation, adoption and marriage to a Swiss national.
In Switzerland, dual nationality has been permitted without restriction since 1992. Under Swiss law a Swiss national acquiring a second citizenship is not required to renounce the original citizenship, and thus solely dependent on the laws prevailing in the country of origin. Likewise, foreigners who apply for naturalisation in Switzerland are not required to renounce their existing nationality. The law, however, specifies that persons who hold Swiss citizenship and are not domiciled in Switzerland must register with the competent representation to be entered in the Register of the Swiss Abroad.
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