(1) Any emergency response or law enforcement person acting in an official capacity;

(2) Any person acting in an emergency situation;

(3) Permanent commercial amplification systems in existence prior to the effective date of the ordinance codified in this chapter as amended; provided, that no changes shall be made to the system which result in increased sound levels;

(4) Civic or school events including, but not limited to, carnivals, fairs, parades and athletic events;

(5) Temporary commercial amplification systems used in isolated enterprises which are not regularly and permanently conducted such as auctions, traveling rodeos and amusement rides.