7B - ORDINANCE RELATING TO NOISE REGULATION; AMENDING SECTION 21-28 OF THE CODE OF MIAMI-DADE COUNTY, FLORIDA; MODIFYING THE CIRCUMSTANCES THAT ESTABLISH A PRIMA FACIE VIOLATION OF THE NOISE REGULATIONS GOVERNING RADIOS, TELEVISIONS, AND SIMILAR DEVICES; PROVIDING SEVERABILITY, INCLUSION IN THE CODE, AND AN EFFECTIVE DATE [SEE ORIGINAL ITEM UNDER FILE NO. 260115]