There's nothing saying it's "illegal" eg in the "insecure" area, but I
guarantee you if you call up the MSP unit at logan they will tell you
"NO you will get arrested" (on what charge I don't know) based on
prior experience dealing with them. Don't even bother asking them
gun law questions, you'll get a wrong answer.
I would wager that "Concealed" is the operative term here.
-Mike