Minn. Stat. § 154.25: NOT TO SERVE CERTAIN PERSONS.

No person practicing the occupation of a barber in any barber shop, barber school, or college in this state shall knowingly serve a person afflicted, in a dangerous or infectious state of disease, with any contagious or infectious disease. Any person so afflicted is hereby prohibited from being served in any barber shop, barber school, or college in this state. Any violation of this section shall be considered a misdemeanor as provided for in sections 154.001, 154.002, 154.003, 154.01 to 154.162, 154.19 to 154.21, and 154.24 to 154.28.