Tenn. Code Ann. § 68-122-112: Operation without certificate or at excessive pressure — Penalty.

It is unlawful for any person, firm, partnership or corporation to operate a boiler under pressure in this state without a valid inspection certificate. The operation of a boiler without such inspection certificate, or at a pressure exceeding that specified in such inspection certificate, constitutes a Class C misdemeanor on the part of the owner, user, or operator of the boiler. Each day of such unlawful operation is a separate offense.