Question:

I was told I am required to have a 6-point driver restraint system in my Top Sportsman car; is this correct?

Answer:

That is not correct.  A quick-release, 3-inch minimum width restraint system, with a 2-inch crotch strap, meeting SFI Spec 16.1 or 2-inch-minimum-width driver restraint system, with 2-inch crotch strap meeting SFI Spec 16.5 is mandatory in all cars in competition required by the rules to have a roll bar or roll cage.