(a) It is an affirmative defense to a charge under Section 511.01 that the operator was not otherwise prohibited by law from operating the sound amplification system, and that any of the following apply:
(1) The system was being operated to request medical or vehicular assistance or to warn of a hazardous road condition;
(2) The vehicle was an emergency or public safety vehicle;
(3) The vehicle was owned and operated by the City or a gas, electric, communications, refuse or water utility company; and
(4) The vehicle was being used in a parade, and the person or organization conducting the parade had obtained a parade permit from the appropriate City agency.
(Ord. 171-90. Passed 11-26-90.)