Yes it did change. Just 2 days ago it did say that cover cannot be render/ai generated image. Now it says:
All Exclusive Models require at least one photo of the actual printed model to ensure print quality. All models using only screenshots or rendered photos as model photos will be removed as Exclusive Model.
I should’ve quoted verbatim the cover rule in my reply commenting on subjective vs objective guidelines as it was IMHO good, clear and objective. Now it doesn’t differ from standard profile upload rules 