The Brief St. Pete Beach is hosting a free public seminar Thursday to explain Florida’s "customary use" doctrine and how it affects beach access. The seminar runs from 5 to 6:30 p.m. at St. Pete Beach City Hall Commission Chambers. If you’ve ever wondered where the public beach ends and private property begins, St. Pete Beach officials hope to answer that question. Courtesy: St. Pete Beach City CommissionIn response, St. Pete Beach commissioners approved an ordinance prohibiting permanent private property signs within 50 feet of the mean high-water line. Florida public beach access lawWhat we know:Florida law generally divides beaches into two sections.