I don't know what other states req's are, but in NY you have to wear a back tag when hunting. I learned the hard way that you should tape the opening shut or secure it somehow. Last weekend, I was goose hunting/turkey scouting...fail!...and my license, back tag, duck stamp, and 2 doe permits somehow slipped out. I didn't notice untill I was packing up to leave (after stomping around though all kinds of swamp / mud/ thorns/ ect). I had to retrace my steps to find them. It turnned out that they fell out in the 1st field I was in. I found them after stomping thorugh all that crap again! While I was thrashing around looking for everything, I busted a goose hanging out in beaver pond. Could have nailled him, but since I didn't have all my papers, I did the right thing and locked the gun up in the car to go look. [:@][:@][:@].
lesson learned! make sure your license is safe! stupid geese.