A. The requirements of this chapter are presented as a minimum requirement for safety. In their enforcement they shall be supplemented, especially as to detail, by the regulations of the National Board of Fire Underwriters.

B. Only devices and materials which have been tested and/or approved by the Underwriter's Laboratories shall be installed or used, and such installation or use shall comply with the latest published regulations of the National Board of Fire Underwriters, a complete set of which shall be kept on file in the office of the fire chief and/or city clerk.

C. The chief of the fire department is authorized and empowered to issue permits for the storage, transportation, use and/or sale of explosives and flammable materials of any description, for the approval of the use of machinery, equipment or apparatus pertinent to such flammable materials. Such permits may be for any definite period at the discretion of the authority enforcing the chapter.

D. Certificates of approval authorizing the installation and maintenance of acetylene equipment, anaesthetical apparatus, blower and exhaust systems, calcium carbide storage, city gas, compressed gas systems, dip tanks, dry cleaning and dyeing plants, inflammable liquid storage, fuel systems (pulverized), gasoline systems (lighting and heat), incinerators, nitro-cellulose X-ray and motion picture films, oil burning equipment, paint spraying and spray booths, pyroxlylin plastic (storage, sale and handling), refrigerating systems, tanks, gravity and pressure, shall be issued and authority to make such installations or maintain such apparatus or equipment must be obtained from the chief of the fire department before such installation is made and certificate of approval issued before such apparatus or equipment is placed in use, tested, filled or otherwise made to perform the function for which it is designed or intended.

E. The chief of the fire department or his assistants may at their discretion charge a fee of not less than one dollar ($1.00) nor more than five dollars ($5.00) for a permit to install, with the subsequent inspection thereof, any one or more units or pieces of equipment made at one time. A complete schedule of such charges shall be approved by the council and be kept on file with the city clerk and/or fire chief.