Originally Posted by Lake Superior Sailor
This quote is out of 2011 Wi. hand book they just sent with registration , so is Wi. lieing about it being a federal law,or what!...Dale
They specifically say (according to your quote) "Federally-controlled waters" so you'll have to find out where those exist within the state. Any Army Corps of Engineer lakes that you know of? In other bodies of water within the state, your state law will determine lifejacket usage.
Generally, the USCG does not trump state laws except in rare cases or where the states do not address a particular issue.