Minn. Stat. § 193.31

The senior member of any company or other organization assembling at an armory for drill or instruction shall have control of the drill hall or other portion of the premises used therefor during such occupancy, subject to the rules prescribed for its use and the orders of that member's superior. Any person who intrudes contrary to orders, or who interrupts, molests, or insults any troops so assembled, or who refuses to leave the premises when properly requested so to do, shall be guilty of a misdemeanor. Nothing in this section shall prevent reasonable inspection of the premises by the proper municipal officer, or by the lessor thereof in accordance with the terms of the lease.