(a) For the purposes of this section, Biscayne Bay, sometimes referred to in this section as "the preserve," shall be comprised of the body of water in Miami-Dade and Monroe Counties known as Biscayne Bay whose boundaries are generally defined as follows:
Begin at the southwest intersection of the right-of-way of State Road 826 and the mean high-water line of Biscayne Bay (Township 52 South, Range 42 East, Miami-Dade County); thence southerly along the westerly mean high-water line of Biscayne Bay to its intersection with the right-of-way of State Road 905A (Township 59 South, Range 40 East, Monroe County); thence easterly along such right-of-way to the easterly mean high-water line of Biscayne Bay; thence northerly along the easterly mean high-water line of Biscayne Bay following the westerly shores of the most easterly islands and Keys with connecting lines drawn between the closest points of adjacent islands to the southeasterly intersection of the right-of-way of State Road 826 and the mean high-water line of Biscayne Bay; thence westerly to the point of beginning. Said boundary extends across the mouths of all artificial waterways, but includes all natural waterways tidally connected to Biscayne Bay. Excluded from the preserve are those submerged lands conveyed to the United States for the establishment of the Biscayne National Monument as defined by Pub. L. No. 90-606 of the United States.