Query about Missa Coram Episcopo

In Paul Turner's Blog by Paul Turner

Q: How do a priest and a bishop divide their roles and responsibilities in the celebration when a Missa Coram Episcopo is held?

I am referring to the Missa Coram Episcopo using Ordinary Form of the Roman Rite/ Novus Ordo. 

Thank you.

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A: The Ceremonial of Bishops no longer uses the term Missa coram episcopo, but it does give instructions for Mass at Which the Bishop Presides but not as Celebrant.

These can be found at nos. 175-186. The bishop wears a cope. He usually uses the miter and pastoral staff and processes behind the celebrant. He incenses the altar and cross. He presides for the Liturgy of the Word from the cathedra if this takes place at the cathedral, Then the celebrant presides for the Liturgy of the Eucharist, and the bishop gives the blessing at the end.

Alternatively, the bishop may decide not to preside but participate by wearing mozzetta and rochet, without using the cathedra.