Hmmm. That’s interesting. I am not an expert in the rules...I had just read that. What I read was that Biden could do it unilaterally. The SHTF if the Dems pull that.
On the other hand, I can’t see the Parliamentarian ruling against the ruling class in the first place. But, could be a non-partisan office?
Yes, they are both FIERCELY independent, by tradition. As a coincidence, this current Senate Parliamentarian found gainful employment only after the last, long standing Parliamentarian, was fired by Trent Lott about 10 or so years ago when he ruled counter to Lott's wishes.
I think it's likely that at least some of the provisions would be struck by the Parliamentarian. How many remains to be seen.