Trailer tires or LT truck tires for car hauler

Well EVERY truck in California has commercial plates. every toyota, ford... every truck. had a 40 ft pull trailer, not fifth wheel, with michelin x tires. got tagged for electric brake problem, but nothing said about the wrong tires. I still think it is a non issue. And unless im mistaken pickups dont have to go through scales. Like I said ALL over the country never pulled in a scale with one ton truck with CA plates. pulling Carnival equipment, talk about a red flag! Just bought a 35ft fifthwheel last year came with LT 10 ply rated tires.