from Father Z....in his article found here.
Bishop Morlino understands that, when the Pope decides to derogate for himself from the liturgical law, that derogation doesn’t abolish the law for everyone else. The law remains. We priests and bishops must obey the liturgical law which we do not have the authority to break or change on our own authority. The Church is not lawless. The Church is not merely a display case for people’s passing whims and changing fashions.