I had one do that to me at 60 mph in an 89 Cherokee. I DID have it on, shoulder harness and all, he just didnt see it at that speed. He didnt write me though. Retarded...
Look up the law. Unless it was amended, it specifically exempts vehicles that didnt come with them from the factory, as well as vehicles older than a specific yr. (might be 67, I dont remember)
The catch is, if u add them aftermarket, I dont know if that means the law now applies. In any event, if u only have lap belts, no way in hell he could "observe" that. I enjoy like hell sitting on the aftermarket LAP belts in my 66.