In his 1980 letter to the Bishops on the Holy Eucharist, Pope John Paul II said: “There are also those people who, having been educated on the basis of the old liturgy in Latin, experience the lack of this ‘one language’, which in all the world was an expression of the unity of the Church and which, through its dignified character, elicited a profound sense of the Eucharistic mystery. It is therefore necessary to show, not only understanding, but also full respect towards these sentiments and desires. As far as possible, these sentiments and desires are to be accommodated.”
“To all those Catholic faithful who feel attached to some previous liturgical and disciplinary forms of the Latin tradition, I wish to manifest my will to facilitate their ecclesial communion by means of the necessary measures to guarantee respect for their rightful aspirations.”
Pope John Paul II, Motu Proprio “Ecclesia Dei,” July 2, 1988.
In 1988, Pope John Paul II issued his binding instruction Ecclesia Dei Adflicta. The Pope ordered: “Respect must everywhere be shown for the feelings of all those who are attached to the Latin liturgical tradition by a wide and generous application of the directives already issued by the Apostolic See.”
This instruction grants a privilege to Catholics under Canon Law. Cardinal Mayer, the former head of the Vatican Commission Ecclesia Dei, said the Pope had spoken of the “lawfulness” of the Tridentine Mass and of the “legitimate aspiration” of Catholics to celebrate or attend that Mass. “Hence a privilege in the canonical sense of the term was granted to the faithful by the supreme legislator of the Church,” said Cardinal Mayer. “Once a privilege is duly granted, the subject indeed has the right to benefit from it.”
(Please reread the last few lines of the above quote!)
I realize that the above aren’t directly related to the need for an indult, but
here’s an essay more in tune with the ‘permission’ aspect of this subject:
catholicliturgy.com/index.cfm/FuseAction/ArticleText/Index/65/SubIndex/111/ArticleIndex/37