Cardinal Muller is keen to "respect the legitimate principle of diocesan autonomy and subsidiarity".

Canon Law and the Pontifical Secret expose the contradiction of that statement.

The practical reality is that diocesan bishops are dictated to by the Curia utilising both; which is why Pope Francis was elected by the majority of the College of Cardinals with a brief to reverse the process and return their autonomy. That is the yardstick by which Francis will be measured. Cardinal Muller has just proved that the Pope has no traction on changing that issue. Time is slipping away.