I am a dual U.K/U.S citizen and wish to spend longer than ninety days on a ski trip in Norway this winter. For the purposes of the trip Brexit shouldn’t be relevant as there will no doubt be a significant grace period before any changes are implemented. What process do I need to go through to legally stay for 110 days, bearing in mind I will be traveling consistently and will have no particular residence address other than the AirBnB or hotel I will be in on any given night? Thank you for any advice you can offer.
According to https://www.udi.no/en/word-definitions/registration-certificate-for-eueea-nationals/ you need to register with the police as an EEA national living in Norway for more than three months.
It says explicitly that you need to register only once, so presumably it will not be a problem that you move around within norway after having registered.
(The registration certificate is not a permit that can denied; it is just a receipt that documents you have told the police that, "I am going to be around").