Can a dealership sell a car with no Rear headrest

If it didn't come with them, from the factory, it's not illegal. It could be an extra cost option. Like front seat headrests were before 1969 and shoulder seat belts before 1967. Perhaps they can put them in for you as a dealer installed option. At your expense, of course. Jim

Thanks Ed. I wasn't sure if rear seat head restraints became required later. Good to know! Jim