New York Governor Andrew M. Cuomo just signed a law requiring anyone operating a motorboat on the state’s waterways to take an eight-hour boating safety course. The law has a phase-in period, giving boat owners time to comply, that goes to Jan. 1, 2025. The new legislation is called Brianna’s Law, after Brianna Lieneck, of Deer Park, New York (pictured above), who was killed in a boating accident in August, 2005. She and her family were riding home on Great South Bay when a larger powerboat crashed into the side of their boat where Brianna was seating. She was killed,…