Project sponsor controls scope changes, not the PM (Score 1)

Ummm, the Project Manager should NEVER say that scope cannot be added. That's not the PM's job nor their responsibility. Any changes to scope are the prerogative of the sponsor (eg. he who pays the bills gets to decide what is important). However, that being said, the PM should never factor any change of scope into the "plan/budget/scope" until they have received _signed_ instructions (formal or e-mail) from the sponsor.