This section and the next will wrap up OE’s look at liturgy.
Eastern clerics and Religious should celebrate in accordance with the prescriptions and traditions of their own established custom the Divine Office, which from ancient times has been held in high honor in all Eastern Churches.(Cfr. Syn. Laodicen., 347/381, can. 18; Syn. Mar Issaci Chaldaeorum, an. 410, can. 15; S. Nerses Glaien. Armenorum, an. 1166; Innocentius IV Ep. Sub catholicae, 6 mart. 1254, 8; Benedictus XIV, Const. Etsi pastoralis 26 maii 1742, 7, n. 5; Inst. Eo quamvis tempore, 4 maii 1745 42 ss.; et Synodi particulares recentiores:Armenorum (1911) Coptorum (1898), Maronitarurn (1736), Rumenorum (1872), Ruthenorum (1891), Syrorum (1888).) The faithful too should follow the example of their forebears and assist devoutly as occasion allows at the Divine Office.
I can’t really say I like the lack of emphasis here for lay involvement in praying the Office. Perhaps Bernard or another Eastern Christian or someone with experience could enlighten us as to the extent of lay participation in the Hours in the Eastern Rites or in the Orthodox tradition.