On ZENIT there was a question put to their resident liturgical expert, Fr. Edward McNamara, of the Legionaries of Christ.
Frequency of the Extraordinary Form
And More on Habit-Wearers
ROME, SEPT. 29, 2009 (Zenit.org).- Answered by Legionary of Christ Father Edward McNamara, professor of liturgy at the Regina Apostolorum university.
Q: I am confused about the permission given by our Holy Father regarding the celebration of Mass using the Tridentine rite (the extraordinary form). Can a parish substitute for all daily Masses throughout the week the "Tridentine form" instead of the "ordinary form"? I understand Sunday Masses must be of the ordinary form, with perhaps the exception of one Tridentine Mass. — D.F., St. Clair Shores, Michigan
A: The most relevant document regarding this point is probably Article 5 of "Summorum Pontificum":
"In parishes, where there is a stable group of faithful who adhere to the earlier liturgical tradition, the pastor should willingly accept their requests to celebrate the Mass according to the rite of the Roman Missal published in 1962, and ensure that the welfare of these faithful harmonizes with the ordinary pastoral care of the parish, under the guidance of the bishop in accordance with Canon 392, avoiding discord and favoring the unity of the whole Church.
"§2 Celebration in accordance with the Missal of Blessed John XXIII may take place on working days; while on Sundays and feast days one such celebration may also be held."
Canon 392 refers to the bishop’s overall right and duty to oversee and enforce the observation of ecclesiastical laws within his jurisdiction.
While the papal document certainly allows some leeway, the fact that it asks pastors to ensure that the celebration of the extraordinary form harmonizes with the ordinary pastoral care would suggest that a parish should not habitually substitute all daily Masses for the extraordinary form. [Okay… there are some rather vague things going on here, "leeway… harmonizes… suggest… habitually".]
A parish with more than one priest could have daily Mass in both forms. [Well… probably a parish with a single priest could also.]
Likewise, in areas where churches are in close proximity, the bishop could allow one parish to celebrate a daily Mass in the extraordinary form for the faithful from several parishes. [It rather sounds as if Fr. M is applying Ecclesia Dei adflicta.] Other possibilities include rotating the celebration of the extraordinary form during the week among two or three nearby parishes.
If the need arises, the papal letter issued "motu propio" (on his own initiative) also foresees the possibility of the bishop establishing a special parish, thus Article 10:
"The ordinary of a particular place, if he feels it appropriate, may erect a personal parish in accordance with Canon 518 for celebrations following the ancient form of the Roman rite, or appoint a chaplain, while observing all the norms of law."
As is obvious all celebrations in such a parish or chaplaincy would be according to the extraordinary form.
The above document says that it is important to seek positive and charitable solutions to the needs of all the faithful so as to avoid discord and to favor the Church’s unity.
It is obviously not a bad think to have all daily Masses (or the only daily Mass) in a parish be in the Extraordinary Form, or there would not be the possibility of parishes where only the older books are used.
So, in all other parishes, it is a matter of working out the "pastoral" exigencies for how to use the TLM in a parish.
I cannot imagine a priest, facing things as they are today in most parishes where the older form hasn’t been used in years, would be able to change all the daily Masses to the TLM in anything like an irenic manner.
I guess this could come up in a parish where there is one priest with one daily Mass scheduled.
You would think that if everyone who went to daily Mass at a parish, and the priest himself, really wanted the TLM rather than the Novus Ordo, and there were requests along those lines and consultation with the regulars, there is little reason why the priest shouldn’t use the TLM for the daily Mass.