first, let me say, awesome response. second, thank you for your service.
now to a couple questions, and questions only... ok.. maybe a lil discussion too..

I'm not insinuation or pointing a finger.
1, I completely agree with running warrants and checking legality ( expire / stolen ) of any visible tags on tow, towed, or trailered vehicles.
2, not sure if it works in your state.. but I know in florida, a LEO can tell if you have a concealed weapon permit befre he even gets to your window.. so the car tag, must link to the driver license, which must also link to the gun license in some way. which is cool.. i'm very suportive of law enforcement, and I'd rather the leo ask me if I am carrying my weapon, than me have to broach the subject and offer that I am armed as i hand my license and cwp over.. ( ps.. I imagine a leo with a legally armed civilian is likely safer than an unknown civilian.. cwp holders, at least in florida according to the latest statistics i have seen, are among the most law abiding cross sections of citizens.. )
now down to the question.. ie.. concerning owning the load you are hauling. here's an average scenerio.. I'll use me as an example. I load up my old ford tractor with a loader on my 16' trailer has lamps, brakes, is tagged legally, etc... put it behind my old dodge.. street legal.. yada, yada.. insurance.. good license.. etc.. say I'm heading down the road to my farm to move some bales of hay I have stacked against the fence into a couple pastures for the cows.. now.. I own the old tractor... but I can pretty much guarantee I don't have a reciept for it .. and of the few units I do have that actually got a reciept.. I can virtually guarantee they won't be in my truck glove box.. they are liekly hidden away in an old file I may have made on the tractor when I got it.. or lost.. or .. well.. maybee just never got one from a private transaction, especially since we don't have to tag our tractors here.
ok.. there's the preface... i get pulled over by you.. for whatever reason.. looked like i swerved.. load didn't look ballanced.. uh.. rock jumped up and busted a turn signal after I got going.. etc.. whatever.. routine traffic stop.. If asked if i own the tractor, I'd answer yes.. if asked if I could prove it.. that would be a head scratcher... where would we go from there...?
( i'm waiting for another cool writeup like your previous post.. it was well thought out and shows good character.. .. so.. no pressure or anything...

)
soundguy