Source: https://conchopadre.net/2011/05/13/norms-clarified-for-the-celebration-of-the-latin-tridentine-mass/
Timestamp: 2019-04-19 14:16:41+00:00

Document:
Here is the English text of the document “Universae Ecclesiae” released today at the Vatican by the Pontifical Commission Ecclesia Dei, to clarify the use of the Roman Missal of 1962.
1. The Apostolic Letter Summorum Pontificum of the Sovereign Pontiff Benedict XVI given Motu Proprio on 7 July 2007, which came into effect on 14 September 2007, has made the richness of the Roman Liturgy more accessible to the Universal Church.
5. Many of the faithful, formed in the spirit of the liturgical forms prior to the Second Vatican Council, expressed a lively desire to maintain the ancient tradition. For this reason, Pope John Paul II with a special Indult Quattuor abhinc annos issued in 1984 by the Congregation for Divine Worship, granted the faculty under certain conditions to restore the use of the Missal promulgated by Blessed Pope John XXIII. Subsequently, Pope John Paul II, with the Motu Proprio Ecclesia Dei of 1988, exhorted the Bishops to be generous in granting such a faculty for all the faithful who requested it. Pope Benedict continues this policy with the Motu Proprio Summorum Pontificum regarding certain essential criteria for the Usus Antiquior of the Roman Rite, which are recalled here.
7. The Motu Proprio Summorum Pontificum was accompanied by a letter from the Holy Father to Bishops, with the same date as the Motu Proprio (7 July 2007). This letter gave further explanations regarding the appropriateness and the need for the Motu Proprio; it was a matter of overcoming a lacuna by providing new norms for the use of the Roman Liturgy of 1962. Such norms were needed particularly on account of the fact that, when the new Missal had been introduced under Pope Paul VI, it had not seemed necessary to issue guidelines regulating the use of the 1962 Liturgy. By reason of the increase in the number of those asking to be able to use the forma extraordinaria, it has become necessary to provide certain norms in this area.
c.) promoting reconciliation at the heart of the Church.
9. The Sovereign Pontiff has conferred upon the Pontifical Commission Ecclesia Dei ordinary vicarious power for the matters within its competence, in a particular way for monitoring the observance and application of the provisions of the Motu Proprio Summorum Pontificum (cf. art. 12).
10. § 1. The Pontifical Commission exercises this power, beyond the faculties previously granted by Pope John Paul II and confirmed by Pope Benedict XVI (cf. Motu Proprio Summorum Pontificum, artt. 11-12), also by means of the power to decide upon recourses legitimately sent to it, as hierarchical Superior, against any possible singular administrative provision of an Ordinary which appears to be contrary to the Motu Proprio.
§ 2. The decrees by which the Pontifical Commission decides recourses may be challenged ad normam iuris before the Supreme Tribunal of the Apostolic Signatura.
11. After having received the approval from the Congregation for Divine Worship and the Discipline of the Sacraments, the Pontifical Commission Ecclesia Dei will have the task of looking after future editions of liturgical texts pertaining to the forma extraordinaria of the Roman Rite.
12. Following upon the inquiry made among the Bishops of the world, and with the desire to guarantee the proper interpretation and the correct application of the Motu Proprio Summorum Pontificum, this Pontifical Commission, by virtue of the authority granted to it and the faculties which it enjoys, issues this Instruction according to can. 34 of the Code of Canon Law.
13. Diocesan Bishops, according to Canon Law, are to monitor liturgical matters in order to guarantee the common good and to ensure that everything is proceeding in peace and serenity in their Dioceses5, always in agreement with the mens of the Holy Father clearly expressed by the Motu Proprio Summorum Pontificum.6 In cases of controversy or well-founded doubt about the celebration in the forma extraordinaria, the Pontifical Commission Ecclesia Dei will adjudicate.
a.) Every Catholic priest who is not impeded by Canon Law7 is to be considered idoneus (“qualified”) for the celebration of the Holy Mass in the forma extraordinaria.
b.) Regarding the use of the Latin language, a basic knowledge is necessary, allowing the priest to pronounce the words correctly and understand their meaning.
c.) Regarding knowledge of the execution of the Rite, priests are presumed to be qualified who present themselves spontaneously to celebrate the forma extraordinaria, and have celebrated it previously.
29. Permission to use the older formula for the rite of Confirmation was confirmed by the Motu Proprio Summorum Pontificum (cf. art. 9 § 2). Therefore, in the forma extraordinaria, it is not necessary to use the newer formula of Pope Paul VI as found in the Ordo Confirmationis.
30. As regards tonsure, minor orders and the subdiaconate, the Motu Proprio Summorum Pontificum does not introduce any change in the discipline of the Code of Canon Law of 1983; consequently, in Institutes of Consecrated Life and Societies of Apostolic Life which are under the Pontifical CommissionEcclesia Dei, one who has made solemn profession or who has been definitively incorporated into a clerical institute of apostolic life, becomes incardinated as a cleric in the institute or society upon ordination to the diaconate, in accordance with canon 266 § 2 of the Code of Canon Law.
34. The use of the liturgical books proper to the Religious Orders which were in effect in 1962 is permitted.
The Holy Father Pope Benedict XVI, in an audience granted to the undersigned Cardinal President of the Pontifical Commission Ecclesia Dei on 8 April 2011, approved this present Instruction and ordered its publication.
Given at Rome, at the Offices of the Pontifical Commission Ecclesia Dei, 30 April, 2011, on the memorial of Pope Saint Pius V.

References: art. 12
 § 1

§ 2
 art. 9
 § 2
 § 2