Gas appliance servicemen not qualified for registration under this chapter as a master gas fitter or journeyman gas fitter, and whose activities are limited to the repair of gas appliances for electrical or mechanical defects and not gas fittings or gas-operated parts of an appliance, are hereby authorized, for the purposes of repair and service only, to disconnect the appliance from the gas line and reconnect such appliance, subject to the conditions set out in sections 34-10 to 34-12. (Mont. Co. Code 1965, § 95-9.)