This is by the media called the Tesla-tax, but as Yggdrasil says the way it's worded it seems the S will get around $1000 and the heaviest EVs (which is the XP100D) get upto around $9000. Keep in mind this would probably affect the Audi Quattro Ev they've accepted preorders for in Norway as well. As we don't know if this gets voted in yet or the specifics I can't say much more right now. Officially the budget is published tomorrow and then it needs to be voted on, so regardless the earliest the effect will come is 1 jan 2018. So Q4 might be very aggressive for Norway sales of X and S.
Cobos
Considering it wont go into effect until 2018 if at all, calling it a Tesla tax is acknowledging Tesla has no direct competition in these EV segments. I think that dichotomy will be lost on the bears who tout incoming direct competition.