You're spinning like a top. Read the article again. It states quite clearly the necessity for the EO and the "mandatory" designation wording purpose. Try again.
Well, it appears you got the same impression from the article that I did. But the article does not assert that Guardrail was made mandatory by statute, either state or federal.
I understand the several purposes of the "mandatory" designation beyond vaccinating the bulk of the population. My point was and is that (it's my understanding that) the mandatory designation came from the governor.
Assuming there was an issue with the "opt out" process, in general (applied to any vaccine), that issue can be resolved without making another vaccine mandatory. IOW, making "opt out" easier for objectors is a smoke screen from the issue of which vaccines should be mandatory, and whether or not Gardasil vaccinations should be mandatory.