Got a reply from Jon Arne Trollvik saying no, the Norge i bilder WMS data can not be used for OSM. It has licensing and is not open. So please stop using your WMS access to edit.

Sent a request for clarification on this.
From what I can tell the wms data is restricted and not released under NLOD or CC BY.
https://kartkatalog.geonorge.no/search?text=bilder
Some of the data have no icon under open data column, but that doesn't mean it can be used. Only data with a green open lock would be acceptable for use in OSM.

This is not a closed case. Will take this with the OSM data working group. Can't have OSM end up in a copyright problem.
You might end up with account ban and all data reverted. Really hope not, but they are very strict on this. So unless you can show a letter saying they explicitly allow you to use this to improve OSM, then this is a legal problem.

Only data from Kartverket that can be used in OSM is what you find at http://kartverket.no/Kart/Gratis-kartdata/ which is licensed under CC BY 4.0

But then you are not allowed to use this in OSM. Data used in OSM need to be open data, not some data that one person have access to.

If you have a written permission by Kartverket to use those aerials in OSM then you need to post a copy of the permit on the mailing list and put on the OSM wiki. If this is a permission for only you then you can not use it in OSM.
I needs to be reported in as a source we can legally use.

Keep in mind that "Norge i bilder" can not be used as a source when editing here. This data is not considered open.

Karverket can be slow to update some data. Though "Norge i bilder" is showing the new runway and E39 in a picture taken May 2013. Further back in 2010 it was still under construction. Looks like Google map aerial is from around 2010. Bing however have a more recent one showing the longer runway.

My own eyes?
They altered the area when the runway was made longer.
You can check out Google, Bing, Norge i bilder and vegkart.no if you do not believe me.

Please do not edit roads and things you know nothing about. You reverted my edit around Anda. Was tempted to revert the entire changeset, but I have instead fixed your road mistakes.

Ask the previous editor if you find data that might not match before editing.

date_on og date_off var satt som utdatert i 2013.
osm.wiki/Deprecated_features

Var ein gammal draft der der. Ikkje klar over at den eksisterte.

Bør bruke conditional access tags her. Date on/off skal ikkje brukast lenger.

Where is the approval to use these aerials? I have never seen this been discussed on the mailing list.

Ups! Wrong set. You were listed as having changed a relation and a border. Apparently Mr. Lindseth is the one to blame :)

Har du tenkt å rydde opp?

Her har du laga mykje rot i N50 importen....

Ver så snill å ikkje importere blindt. Masse av importen har faktisk laga kartet dårlegare. Ta inn Elveg data der det ikkje er gater fra før.

Så heile Knappetunnelen er skilta som motorveg??

Do not move house number nodes if you do not know what you are doing. These are very good quality data from Kartverket. Moving them destroys the accuracy of the map.
If the nodes do not match the aerial imagery then assume the aerial is wrong. Bing and other aerials are often misaligned with the real world.