Bucket Seat Head Rests

Yep 1-1-69, head restraints became mandatory, prior to that, they were optional.
I always thought it was morbidly ironic that the '69 Barracuda brochure (naturally made before the new year's cars came out) listed "Head Restraints-left AND/OR right" as extra options on all three versions.
Can you imagine a person ordering one back then, and adds the head restraint on his (left) side, but doesn't get the passenger (right) side? If they had a spouse, what did they tell them? "Sorry babe, but I couldn't order a safety feature for you because then I couldn't afford the AM AND FM radio, and FM radio is going to be the best car radios will ever get". Lol