I can't absolutely say for sure, but at least the first time I heard about the no picture rule was the last week in June, so that was after the Tonys.
The no picture rule is said for everyone, not just John and Norbert.
I would imagine though if the stage door is very crowded, you probably won't be able to get a picture. But if it's not that crowded, it's definitely worth it to ask...nothing to lose.
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli