[cjg_]

Norway is in the EEA and that means they are effectively bound by same rules as the rest of the EU governing trade.

[TazeTSchnitzel]

The EEA free trade and common standards have significant exceptions for agricultural and fisheries products. Norway and so on are not subject to the Common Agricultural Policy or Common Fisheries Policy, and can put significant tariffs on EU products in those areas AIUI.

[hdfbdtbcdg]

They are not in the Customs Union.