It shall be unlawful for any person to wilfully discharge, explode or cause to be discharged or exploded any fireworks, firecrackers, Roman candles, skyrockets or other pyrotechnical displays within the city limits; provided, however, that fireworks may be discharged for the entertainment of the public within the city after written consent of the council is obtained. All such events shall be under the supervision of the fire chief and firemen of the city. (Ord. 39, 10-6-1952)