Rich Car Guy Problems: Montana License Plate Tax Dodge Crackdown

[Ken]

As some of you may know, there's a tax avoidance/evasion scheme that some car guys have been using for a number of years where they register their car to Montana so they can avoid paying sales tax (or car tax).  
I'm kinda like, if you're gonna use a sketchy tax loophole, don't cry when the tax man comes for dat azz.  

 Or is there actually a law on the books that dictates if the vehicle is in the state for X amount of time then it must be registered in state.  (which sure sounds like the sketchy part to me,  since its impossible to prove and cars arent people)

Actually there are VERY specific laws concerning this with every state.  I have multiple friends that have been fined for this exact issue.

 Yup, when my dad moved to Dallas, the same officer who must have seen him a bunch finally pulled him over for having NY plates. He had to finally change the registration to Texas.