4C - ORDINANCE RELATING TO NOISE REGULATION; AMENDING SECTION 21-28 OF THE CODE OF MIAMI-DADE COUNTY, FLORIDA; MODIFYING AND CLARIFYING THE APPLICABILITY AND ENFORCEMENT OF NOISE REGULATIONS IN THE INCORPORATED AND UNINCORPORATED AREAS; PROVIDING REGULATIONS RELATING TO USE OF AMPLIFIED SPEAKERS, MEGAPHONES, AND OTHER DEVICES TO AMPLIFY SOUND FOR TOURS PROVIDED ON OR FROM VESSELS; DIRECTING THE COUNTY MAYOR OR COUNTY MAYOR'S DESIGNEE TO ENFORCE SUCH REGULATIONS; PROVIDING SEVERABILITY, INCLUSION IN AND EXCLUSION FROM THE CODE, AND AN EFFECTIVE DATE