Gasoline Stoves. The sale or use of gasoline stoves or other similar fuel-burning cooking or heating appliances using Class I flammable liquids as defined in NFPA 1 Fire Code (2024 Edition) and NFPA 30 Flammable and Combustible Liquids Code (2024 Edition), is prohibited unless the appliance has been tested and listed by a testing laboratory accepted by the State Fire Marshal. The appliance shall be installed, operated, and maintained in a safe manner in accordance with the prescribed recommendation of the manufacturer and the conditions stated in the listing by the respective testing laboratory. Unvented Portable Kerosene-Fired Heaters. The sale or use of unvented portable kerosene-fired heaters is permitted only if the heater or appliance meets the U.L. Subject 647 and bears the label of a testing laboratory accepted by the State Fire Marshal. The heaters shall only be used as permitted under Commercial Law Article, §14-1310, Annotated Code of Maryland. Each heater shall contain a warning label stating: “This device must not be operated while unattended”. In addition, the heater shall contain the manufacturer's warning label required by Commercial Law Article, §14-1310, Annotated Code of Maryland.