I think I read that this is mainly for the VFX people who need to be on-set (since they need to make sure that what is being shot will then be usable for compositing and adding VFX, etc. Those are the people who can’t be offshored. Can they be contractors? Maybe, but maybe the other unions for the other people on the set might refuse to work with non-union contractors.

So I’m not sure how this will affect the VFX contractors who do the VFX work that comes after principal photography.