The Foreign Nationals Act has been renamed the Foreign Nationals and Integration Act, with effect from 1 January 2019. The Foreign Nationals and Integration Act has revised the earlier provisions and introduced new ones to encourage and support foreign nationals' integration into Switzerland. Further, the act now includes provisions relating to the integration of non-EU nationals in Switzerland.
In the event of a no-deal Brexit, British nationals who take up residence in Switzerland after 29 March 2019 would not benefit from any rights of protections currently granted under the Agreement on the Free Movement of Persons and would thus be considered non-EU nationals. Under Switzerland's ordinary immigration regime, non-EU nationals generally have no right to obtain a Swiss residence and work permit, and Swiss immigration authorities have wide discretionary power when reviewing permit applications.