There are a number of overlapping things. Within the EU, the "four freedoms" apply, of which on "freedom of movement" is the thing mainly at play. The EFTA st

There are a number of overlapping things. Within the EU, the "four freedoms" apply, of which on "freedom of movement" is the thing mainly at play. The EFTA states have a similar distinct thing between them. How all EFTA states (bar Switzerland - i.e. Iceland, Norway, Lichtenstein) are also in the EEA Agreement, and the EU "four freedoms" also apply there. Switzerland has a raft of linked treaties with the EU, which sort of replicate the EEA agreement, and includes the "four freedoms".