If you are uncertain about whether the commodity code you have found is correct, you may ask Norwegian Customs for a binding tariff information (BTI).
You can do this by sending an application to the customs region where your company is registered.
You must describe the item in detail on the application. If necessary, you should enclose technical descriptions, drawings, brochures or other documentation that may help with classification. A sample of the good is always helpful and sometimes necessary. You will receive a response in writing. The decision is binding for you and for the Norwegian Customs, generally for six years. Be aware that the binding tariff information is not valid for items that were processed by Customs before the BTI was issued.
Database of previous decisions
When Norwegian Customs issue a BTI, these are also made availible on internet. You can search by item type or commodity code, and this can help you to find the right commodity code for your item.