The announcement of the Norwegian authorities applies specifically for cruise ships and only allows participation in the cruise with a full Covid-19 vaccination. Neither a proof of recovery nor a negative test entitles travelers to boarding.
In addition to adults, the rule also applies to children and teenagers who were allowed to embark with a negative test until now. The proof of a complete vaccination can travelers only provide digitally with the 'Cov Pass' app upon embarkation. Otherwise it is not possible to join the cruise.
For travelers not using the ship, but entering Norway by car or airplane, less strict rules apply.