Actually, after re reading those rules are a bit confusing , the 4th one seems to take precedence over the other 3, and it makes it sound okay.
Nein! They must all be followed.
"I am the cop" is OK. (refers to information but doesn't quote)
"My role PM says I am the cop" is not OK. (violates rule 3)
"Role: Cop" when the PM says "Role:Cop" is not OK. (violates rule 4)
Malevolent was referring to a situation which is no longer applicable to this game so I didn't see a need to step in. However, if someone makes a similar statement about THIS game, then, at a minimum, a friendly warning will be forthcoming since it would violate rule 3.