Liza's Headband said: "Point of clarification: they're not "official" lyrics if they're not in the authorized materials of the licensed version of a musical. Just because these lyrics were supposedly once used in the Broadway production doesn't give you the right to change them (thus altering the licensing-sanctioned print materials). "
I didn't mean official to that specific licensed version, I meant they are lyrics that were used in an official production and not just something I came up with myself. I'm aware that the lyrics were still not supposed to be altered from the ones in the licensed librettos, but I thought some of the new lyrics were really awful, so I made that call anyways.
(Also, some of the lyric changes in the licensed version were actually changed back at some point - by way of them including a single printed sheet of paper with said changes tucked inside the front cover of one of the librettos, which I didn't find until we were well into rehearsals. So, I'm guessing they're not too pressed about it, or if they are, they should probably officially change them in the librettos.)