MF, fairpoint about these things coming out in the wash later on, but that is "after the fact" if you like, I'm talking about up front enforcement.
Set aside the foreign element for a moment, If a non FTB applies for stamp exemption and their other property(ies) are within the state then a routine check will show the application as being in bad faith & the applicant will be refused or prosecuted, whatever, but running the same check for an individual with foreign property only, will raise no such flags which leads me back to the rule being a bit arbitrary & unenforceable.
I really don't see how they can check/enforce such a ruling.