33 CFR § 80.757 - Suncoast Keys, FL to Horseshoe Point, FL.
(a) Except inside lines specifically decribed in this section, the 72 COLREGS shall apply on the bays, bayous, creeks, and marinas from the Suncoast Keys to Horseshoe Point.
(b) A line formed by the centerline of Highway 44 Bridge over the Salt River.
(c) A north-south line drawn through Crystal River Entrance Daybeacon 25 across the river entrance.
(d) A north-south line drawn through the Cross Florida Barge Canal Daybeacon 48 across the canal.
(e) A north-south line drawn through Withlacoochee River Daybeacon 40 across the river.
(f) A line drawn from the westernmost extremity of South Point north to the shoreline across the Waccasassa River Entrance.
(g) A line drawn from position latitude 29°16.6′ N., longitude 83°06.7′ W., 300° true to the shoreline of Hog Island.
(h) A north-south line drawn through Suwannee River Mcgriff Pass Daybeacons 30 and 31 across the Suwannee River.