DECREE
In virtue of the faculty granted to it by the Supreme Pontiff John Paul II, the Pontifical Commission Ecclesia Dei concedes to that which is called the “Fraternity of St. Peter”, founded July 18, 1988 and declared of “Pontifical Right” by the Holy See, the faculty of celebrating Mass, and carrying out the rites of the sacraments and other sacred acts, as well as fulfilling the Divine Office according to the typical edition of the liturgical books in force in the year 1962; namely the Missal, Ritual, Pontifical, and Roman Breviary. This faculty may be used in their own churches or oratories; otherwise it may only be used with the consent of the Ordinary of the place, except for the celebration of private Masses.
Anything to the contrary not withstanding.
From the seat of the Pontifical Commission “Ecclesia Dei”, on the 10th day of September, 1988.
AUGUSTIN Cardinal MAYER
President
CAMILLE PERL
Secretary
fssp.org/en/declivres1962.htm
Sometimes around 1990 they made a photocopic reprint of the bilingual 1963 edition of the Breviary for their own use. I suppose most of them are using the Nova et Vetera Latin only edition, as the best available for the 1960 Roman Breviary.
John XXIII ordered the new rules for the Roman Breviary in June 1960 ordering the usage beginning of 1961 January first. The Latin typical edition was printed only in 1962
Unlike for the Holy Mass (where St Joseph was added to the Canon as part of the Communicantes prayer in 1962) there was no further change in 1962, only the Tres abhinc annos in 1967 (
adoremus.org/TresAbhinc.html) shortened the obligatory part of the office. The FSSP did not adopted this changes.