BMC91 and BMC91X refer to liability insurance required by all carriers, ie. liability is not cargo insurance. BMC84 and BMC85 refer to HHG's, cargo insurance required. Non HHG's do not require Cargo insurance. Here's a link: http://www.fmcsa.dot.gov/registration-licensing/cargo-insurance.aspx
And there is where the problem lies. Any of the RV Haulers running without signs, if they have an accident, their insurance is not valid. Little known fact of the insurance coverage.
The reason the Jennifer (big boobs no brains...still nice to look at though) got stopped is she didn't shut her lights off. That's all she would've had to do. I go by the signs when I'm in my pickup pulling trailers. NE, and KS your ### is grass if you blow by a scale with a small trailer empty or not they'll run you down, bring you back, and run you across. I cannot say that I've ever seen a horse trailer overloaded. Even a 4 or 5 horse gooseneck has always been legal. Stock trailers I have seen overloaded. It is a funny show to watch seen last week they had a few new couples. Couple blondes company name was 2 blondes and a truck, and another couple MPR transport. The blondes are well...blonde lol. MPR'S motto was they go low we go lower. Wonder if they were the dumb pricks that undercut me on the 2 trailers coming out of my back yard. Beatrice, NE to Fitzgerald GA. 1150 1 way. Bid both trailers out at 9600...winning bid was 1256 hope them idiots blow a tire 1/2 a mile south of town, twist off a drive line and then puke a motor. Load outs from my area don't pay that well down to the southeast.