Ecclesia Dei developing clarifying guidelines for Summorum Pontificum?

A reader sent in the following Italian language story speaking about the Pontifical Commission Ecclesia Dei developing guidelines on the implementation of Summorum Pontificum: PETRUS - Il quotidiano online sull'Apostolato di Benedetto XVI

Some snippets from the document include the following confirmations from Msgr. Camille Perl:

"It's true, we are redacting a document/instruction on the right interpretation of the Motu Proprio ‘Summorum Pontificum’."

The document will contain "the definition of some aspects of the papal Motu Proprio as, e.g., the stable group. We will have to clarify what is to be understood as a stable group, how many people precisely have to ask their parish priest to celebrate in the preconciliar rite."

(Asked why many priests and bishops don't accept the MP) "Today, in all areas of society, the sense of obedience and of respect for authority has been lost."