I've called back for the officer that wrote the letter (as it instructs at the bottom that I can call them with questions). They are yet to return my voicemail however.
(I thought handgun laws were at a state level though? Each county has their own rules?)
Unless we plan to sell the house, no. Moving is a kind of nonsensical, for something that I don't see any kind of legal precedent for.
(That I can find.)
It's Ramsey county, if you must.

