I always thought I needed a Type IV Throwable flotation device on my small 8' boat until I read this today on the VDGIF website:

In addition to the wearable life jacket, there must be at least one (1) USCG approved Type IV throwable (ring buoy or seat cushion), on vessels of 16 feet or greater. The regulation to carry a Type IV does not apply to (1) personal watercraft; (2) non-motorized canoes and kayaks of 16 feet or greater; (3) racing shells, rowing sculls, racing canoes, and racing kayaks; (4) sailboards; and (5) vessels of the United States used by foreign competitors while practicing for or racing in competition.
I'm using an 8' Bass Baby plastic boat on electric only lakes. So it looks like I don't need one? Space is tight and I'd rather not if I can get away with it.