You are wrong, those were on the list but the parent just needed to say no, and they could enter school without it. Kind of like saying the child had to have the right pants to enter school but the parent only had to say no, we have a different color and they could still enter.
They didn’t just have to say no. They had to obtain a signed affidavit. A signed affidavit for a vaccine that had been on the market for less than a year.