Some highlights from the three page document, but I recommend reading the entire thing.
Hence it is licit to celebrate the Sacrifice of the Mass in accordance with the typical edition of the Roman Missal promulgated by Blessed John XXIII in 1962 and never abrogated, as the extraordinary form of the Liturgy of the Church. The conditions laid down by the previous documents Quattuor abhinc annos and Ecclesia Dei for the use of this Missal are replaced by what follows:
Art. 2. In Masses celebrated without the people, any priest of Latin rite, whether secular or religious, can use the Roman Missal published by Pope Blessed John XXIII in 1962 or the Roman Missal promulgated by the Supreme Pontiff Paul VI in 1970, on any day except in the Sacred Triduum. For celebration in accordance with one or the other Missal, a priest does not require any permission, neither from the Apostolic See nor his own Ordinary.
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Art. 4. With due observance of law, even Christ’s faithful who spontaneously request it, may be admitted to celebrations of Holy Mass mentioned in art. 2 above.
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Art. 5, § 1. In parishes where a group of faithful attached to the previous liturgical tradition exists stably, let the pastor willingly accede to their requests for the celebration of the Holy Mass according to the rite of the Roman Missal published in 1962.
§ 5. In churches, which are neither parochial nor conventual, it is the Rector of the church who grants the above-mentioned permission.
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Art. 7. Where some group of lay faithful, mentioned in art. 5§1 does not obtain what it requests from the pastor, it should inform the diocesan Bishop of the fact. The Bishop is earnestly requested to grant their desire. If he cannot provide for this kind of celebration, let the matter be referred to the Pontifical Commission Ecclesia Dei.
Art. 9, § 1. Likewise a pastor may, all things duly considered, grant permission to use the older ritual in administering the Sacraments of Baptism, Matrimony, Penance and the Anointing of the Sick, as the good of souls may suggest.
§ 2. Ordinaries are granted the faculty to celebrate the sacrament of Confirmation using the former Roman Pontifical, as the good of souls may suggest.
§ 3. It is lawful for clerics in holy orders to use even the Roman Breviary promulgated by Blessed John XXIII in 1962.
Art 10. It is lawful for the local Ordinary, if he judges it opportune, to erect a personal parish according to the norm of canon 518 for celebrations according to the older form of the Roman rite or appoint a rector or chaplain, with due observance of the requirements of law.
