The "Guidelines for Admission to the Eucharist between the Chaldean Church and the Assyrian Church of the East" explicitly apply these rules, which hold also for the Ancient Church of the East and all Eastern Orthodox churches, to the Assyrian Church of the East. "When necessity requires, Assyrian faithful are permitted to participate and to receive Holy Communion in a Chaldean celebration of the Holy Eucharist; in the same way, Chaldean faithful for whom it is physically or morally impossible to approach a Catholic minister, are permitted to participate and to receive Holy Communion in an Assyrian celebration of the Holy Eucharist".