Until recently I owned a 71 Monte Carlo, it was equipped with the "chest protector belts" that were separate from the seat beats and located in clips above the side windows. I never did wear these driving. One day at the VFW I asked a group on policemen eating lunch if I was required to use them. They didn't really seem to know, the best that they could seem to come up with, was that since the car was equipped with them, that I had to wear them. I said than since it was a law for seat belts, I believed I didn't have to. Anybody really know?