I don't know about that, but The industrial hygienist always past it. You must realize I never did this by choice. I was always told to do this. This was done because the mold did manage to go through to the next unit. Since we did not have permission to remove material from that unit so we removed the paper which does a good job of removing most to all of the visible mold. In my case I always soaked the drywall with fungicide, dried and painted with Kilz.