Use of the 1614 Roman Ritual

In Paul Turner's Blog by Paul Turner

Q:  Is use of the 1614 Roman Ritual of Pius V permitted? Didn’t Benedict’s moto proprio only permit the use of the Roman Missal of 1962 for the sacrifice of the Mass?  We have a seminarian saying the local bishop can give permission to use the older Roman Ritual. This does not seem to fall into Summorum Pontificum.

A: I understand that the 1614 Roman Ritual may also be used. This has raised questions for confirmation, for example, for which the very formula of the sacrament has been changed. But my understanding is that a bishop can authorize and use the older ritual under certain circumstances.
Here’s a link to a page on the web site of the Archdiocese of Washington: