I'm not sure. My seats (OMP VID- Carbon) and OMP brackets were included in the Challenge Kit that was installed by Miller Motorcars in my 1995 F355 Berlinetta in its conversion to an F355 challenge in early 1995. I installed the OMP slider in 2012 right after I bought the car.
I was referring to not having factory laser etched or engraved markings. The label machine made ones of course are exempt.