ORIGINAL
"The emperor is sacred and inviolable..."
PROPOSED
"The emperor is supreme and inviolable..."
Yup, it was clear that more drastic action was necessary.
It was the GHQ's Government Section that was responsible for it. (Fun fact: that section still exists in its evolved form today as @USForcesJapan's Government Relations branch)
So, Beate Sirota took the opportunity to set some new precedent.