To me the CE life jackets are plenty safe, and the Tybee rules should be amended to allow them. Based on what I'm seeing in this thread, in Tybee I will now use a USCG life jacket instead of my CE one that is fully rigged with safety knife, hyrdo pack, etc.
The cure for anything is salt water - sweat, tears, or the sea Isak Dinesen If a man is to be obsessed by something.... I suppose a boat is as good as anything... perhaps a bit better than most. E. B. White