“In the meantime, taking into account the conventional character of ‘time’ and the liberal principles of Rome in the past, we have no doubt that everyone, priest or layman, is fully justified in following the new time if he feels so inclined.” (See Codex Juris. Canon., Can. 33).
Are priests bound to recite Matins and Lauds before Mass?
The first sentence of the Ritus servandus in celebratione Missae in the Missal contains the clause “saltem Malutino cum Laudibus absoluto,” The word saltem indicates that the Church notifies the minimum and expects a further hour, Prime or even others of the small hours, to be finished before Mass. But theologians hold that there is no grave obligation for such prior-to-Mass recital, and that any reasonable cause excuses from the obligation (Lehmkuhl II., 628). In connection with this matter a very instructive and devotional essay in the Irish Ecclesiastical Record (Fourth Series XXXI., n. 533) by Father M. Russell, S.J., is well worth reading. It is entitled “A Neglected Adverb”; the adverb being saltem, from the clause quoted.
At what times should the small hours be recited? Prime may be, and, probably with more appropriateness, should be used as morning prayer and said before Mass. Terce and Sext may be said before mid-day, or Sext and None may be said after mid-day. Vespers should be said after mid-day. Compline was the night prayer of the monks, who probably instituted the hour. It should be borne in mind that the substance of the law of recitation is fulfilled if the whole office of the day be recited before midnight, and that the obligation for entire and complete recitation is grave; while the recitation of the hours at set hours of the day is a light obligation.