Apologies, I know some of these were answered above, but for simplicity sake, I’m doing all to avoid scrolling up continuously.
PR= Pontificalis Ritus, 1968
CE = Ceremoniale Episcoporum 1984
What elements of the pontificalia in a Pontifical High Mass in the EF can be licitly used in the OF?
Exempli gratia: episcopal gloves;
Not mentioned, so one *could *say yes. Gloves may be white. (PR 15)
four chaplains in copes with the mitre, crozier, bugia, and book;
There Ceremonial mentions the ministers who assist with the crosier, mitre and book.
The bugia may be used if it is necessary to give light in a dark church. (PR 16)
The assistants may not wear copes. (PR 9, cf. CE 65)
the two mitres, precious and golden;
No, only one may be used. (PR 18, CE 60)
Not unless it is needed (PR 16) in a rite (ordination, dedication of church/altar, Holy Thursday are all mentioned in the CE).
Yes, and certainly is encouraged for more solemn rites (e.g. ordinations, abbatial blessings, etc.) (CE 56). The dalmatic may always be white.
No. (PR 16)
two assistant deacons in dalmatics;
Yes, the Ceremonial prescribes assistants for the bishop for a number of occasions, especially solemn ones. They wear dalmatics for some; for others, they are vested in choir dress (cassock and surplice). However, priests who assist the bishop in the absence of deacons, may not vest as deacons.
I assume you mean in addition to the assistant deacons - it is not per se forbidden but not mentioned either. One could argue that the cope is not allowed based on the prescription of the Ceremonial that non-concelebrating priests should wear choir dress.
bishop processing into the church before Mass in biretta and cappa magna, then kneeling in the chapel of the Blessed Sacrament, then vesting in the secretarium
Yes, the Ceremonial covers this (CE 79). But the cappa may only be used on an extremely solemn occasion and within the diocese. (CE 64, also Appendix)
Also, his vestments should not be laid at an altar (PR 21) and the Ceremonial does not foresee vesting in a place other than the sacristy.
during the chanting of Terce;
.
This is a tricky one and I’d probably put it among one of those on-the-fence things. The books per se do not mention it, and say that the bishop should preside at an hour of Daytime Prayer in choir dress (CE 218). The Ceremonial also says that a canonical hour, if not joined with Mass in the manner prescribed in the General Instruction for the Liturgy of the Hours, should be celebrated at some other time (CE 124). Thus it does not seem to anticipate the bishop vesting during Terce.
According to PR 22, if the bishop presides at Terce (assuming it is the appropriate hour for the time of day) immediately before Mass, he should be vested in a chasuble. Thus it seems that either: (a) Terce is immediately before Mass, in which case it should be joined with Mass and the bishop vested in chasuble at the beginning of Terce, or (b) Terce with the bishop in choir dress, then vesting, then Mass.
