Although due to difficulties in travel, timing, and frequency of consecrations, this was reduced to the requirement that all comprovincial (of the same province) bishops participate.
"[5] Jus novum (c. 1140-1563) Jus novissimum (c. 1563-1918) Jus codicis (1918-present) Other Sacraments Sacramentals Sacred places Sacred times Supra-diocesan/eparchal structures Particular churches Juridic persons Philosophy, theology, and fundamental theory of Catholic canon law Clerics Office Juridic and physical persons Associations of the faithful Pars dynamica (trial procedure) Canonization Election of the Roman Pontiff Academic degrees Journals and Professional Societies Faculties of canon law Canonists Institute of consecrated life Society of apostolic life Although for validity, only one bishop is needed to raise a priest to the episcopacy, it remains a strict rule of the Catholic Church that there should at least two co-consecrating bishops; with the sole exemption being made in missionary countries where it is very difficult to bring three bishops together.
[6][5] The consecrator and the two assistant bishops impose hands upon the head of the consecrandus saying "Accipe spiritum sanctum.
[1] The first Lutheran bishops of Estonia and Latvia were consecrated by Nathan Söderblom, the Archbishop of Uppsala.
[8] In the Anglican Communion, the co-consecrator takes part in the consecration, so that if the principal consecrator has failed to convey the episcopate to the bishop being ordained, the episcopate can be given by the co-consecrator.