The First Thursday votive Mass of Jesus Christ the Eternal High Priest is impeded, but the customary devotions for priests and for vocations may certainly still be held.
The blessing of meals during the Octave, until lunch of Saturday, is:
V. Spiritus Domini replevit orbem terrarum, Alleluia + .
R. Et hoc quod continet omnia, scientiam habet vocis, Alleluia.
(Cf. reliqua in Benedictio mensae in the Ritual or in the appendix of the Breviary).
Proper Mass; Gloria; sequence Veni Sancte Spiritus; Credo; Preface of the Holy Ghost; proper Communicantes and Hanc igitur, all of which continues throughout the Octave
Matins: All from Pentecost; three lessons, however, are proper; one nocturn with only three psalms; Te Deum
Lauds: All from Pentecost; proper antiphon at Benedictus and proper oration
Prime: All from Pentecost (Sunday psalms, and psalm 53 takes the place of 117); proper oration
Terce: All from Pentecost (Hymn Veni Creator Spiritus); proper oration
Hours: All from Pentecost; proper oration
Vespers: All from Pentecost; proper antiphon at Magnificat and proper oration
Compline: Of Sunday