There will indeed be discussions about optional ceremonies without the Native American regalia going on at NOAC, but nothing I have heard about requiring such a move.
If that were to occur, it will come as a huge surprise to many, as about half of the sessions revolve around the traditional induction ceremonies, AIA and creating regalia.
NOAC attendance is down from 2015, not surprisingly since it was the 100th anniversary, but pulling the rug out from under thousands of attendees would do far more damage than letting us know in advance of any moves toward doing away with Native Ame