7-501. Fireworks defined. "Fireworks" shall mean and include any combustible or explosive composition, or any substance or combination of substances, or article prepared for the purpose of producing a visible or an audible effect by combustion, explosion, deflagration, or detonation, and shall include blank cartridges, toy pistols, toy cannons, toy canes, or toy guns in which explosives are used, the type of balloons which require fire underneath to propel the same, firecrackers, torpedoes, skyrockets, Roman candles, Daygo bombs, sparklers, or other devices of like construction and any devices containing any explosive substance, except that the term "fireworks" shall not include auto flares, paper caps containing not in excess of an average of twenty-five hundredths of a grain of explosive content per cap, and toy pistols, toy canes, toy guns or other devices for use of such caps, the sale and use of which shall be permitted at all times.

7-502. Manufacture, sale and discharge of fireworks. (1) The manufacture of fireworks is prohibited within the city

(2) Except as hereinafter provided it shall be unlawful for any person to store, to offer for sale, expose for sale, sell at retail, or use or explode any fireworks: provided that the chief of the fire department shall have power to adopt reasonable rules andregulations for the granting of permits for parks, and other organizations. Every such display shall be handled by a competent operator approved by the chiefs of the police and fire departments of the municipality, and shall be of such a character, and so located, discharged or firedas in the opinion of the chief of the fire department, after proper inspection, shall not be hazardous to property or persons.