Section 480.140 - Fireworks displays to be under supervision of police and fire department chiefs or county court(1) Every such display held within the boundaries of any municipality shall be under the supervision of the chiefs of police and fire departments of the municipalities in which the display is to be held and shall be of such character, and so located, discharged or fired as, in the opinion of the chief of the fire department, after proper inspection, shall not be hazardous to property or endanger any person.(2) Every such display held outside the boundaries of any municipality or fire protection district shall be under the supervision of the county court of the county in which the display is to be held and shall be of such character, and so located, discharged or fired as, in the opinion of the county court or of a county official duly authorized by the county court, after proper inspection, shall not be hazardous to property or endanger any person.