How does one "illegally" change a location? What law says you can't move your business? Would such a law even be constitutional?
I’m not a Constitutional lawyer or even a scholar, but my layman’s guess is it would not be. The NLRB has no authority to regulate interstate commerce, which in essence is what they are doing. I can find words in the Constitution to the effect that Congress has that authority, but it makes no mention of the National Labor Relations Board. I can find no words in there that even mention it.
“What law says you can’t move your business?”
Why, the infamous Gimme Your Money, Sucker, Sincerely, the Unions Act of 2008.