557.12  EXCEPTIONS.
   The provisions of this chapter shall not apply to the following:
   (a)   The emission of sound for the purpose of alerting persons to the existence of an emergency or for the performance of emergency work; or
   (b)   Organized school related programs, activities or events, or parades or other public programs, activities or events authorized by the Mayor or his designated representative.
      (Ord. 82-17.  Passed 6-28-82.)