PCED responds: Use of Traditional Liturgical Books of Religious Orders "pertains to the superior of those orders"

Recently, a letter was written to PCED asking if it was possible utilize the liturgical variations that were particular to a certain religious order as it was used before it adopted the liturgical reforms of Vatican II. In the same letter, the question was asked if it would be possible to use the ritual in use up to 1962 for the secular (third) order which is part of that same religious order.

PCED response:

Source: The Barque of Peter