Dont know about there, but here in TEXAS, they often check the tanks at places where large numbers of diesel vehicles tend to gather. Places like auctions or rodeos or even some fairs. If caught you get into big trouble. Tax evasion type charges.
Also...Ford says don't use it. I think it lacks some needed additives and may also be higher in sulphur. I think my tractors do better on street fuel, but not better enough to offset the price difference.