Ocracoke Sink Box Hunting

Great vid. Boy does that young man's face glow in the low light, and the birds keep coming in.
Got a question: Is it that the " sink box" or " water pit blind" I'll call it is not floating that makes it legal? I know with layout hunting, the shooters hips can't be below the waterline in the US, and a layout boat or a BBSB are floating.
Very cool rig.

 

Thanks. I should cal it a "sunk box" Does anyone know where I can find US sink box law? I looked at my state's waterfowl law. Couldn't find anything. Googled sink box hunting etc and got sinks at Home depot. Worthless.

 

Thank you for the link/ info bufflehead1. There it is, the key word " floating":

• From a sink box or any other low floating device that conceals you beneath the surface of the water.

 

Isn't this great stuff? Gotta love a new way to hunt. So, heres what I am thinking/ planning. I want to make a sink box or buy something that could be converted to a sink box. Was looking at Rubbermaid laundry bins ( too high, cut down), expensive, look for a used one , maybe too small for two guys, or get out the power tools, plywood and fiberglass and build one. Square cement pavers or half thick cinder block filled with cement would be the weight to make it sink. Anybody know what the NC boys use? Another (Mr. Gadget) idea would be water tanks that are filled and unfilled with a 12 volt pump. I'd want to transport the new fangled, Gunnin Machine on the gunnels of my jon boat, slip her in, weight her down, throw the decoys all around and be close to eye level with the water and the in yo face duck feet coming at ya.