Editing Full communion (section)

===Church of the East===
The [[Church of the East]] is currently divided into churches that are not in full communion with one another. The [[Assyrian Church of the East]] and the [[Ancient Church of the East]] divided in the 20th century over the former's limitation of the post of patriarch to members of a single family<ref>{{cite web|url=http://www.stzaiacathedral.org.au/wp/?page_id=59|title=Our History|website=St Zaia Cathedral|location=Middleton Grange, NSW, AU|access-date=26 August 2016|archive-url=https://web.archive.org/web/20160713160822/http://www.stzaiacathedral.org.au/wp/?page_id=59|archive-date=13 July 2016|url-status=live}}</ref> and due to the adoption of the [[New Calendar]] by the former. There is movement towards reunity, but they are not in full communion with one another at present. The Chaldean Catholic Church shares a similar history with both, but is currently in full communion with neither. The Catholic Church, of which the Chaldean Church is part, allows its ministers to give the Eucharist to members of Eastern churches who seek it on their own accord and are properly disposed, and it allows its faithful who cannot approach a Catholic minister to receive the Eucharist, when necessary or spiritually advantageous, from ministers of non-Catholic churches that have a recognised Eucharist.{{sfn|CCEO|1990|loc=c. 671}}{{CIC1983|844}}

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.<ref name=Guidelines>{{cite web|url=https://www.vatican.va/roman_curia/pontifical_councils/chrstuni/documents/rc_pc_chrstuni_doc_20011025_chiesa-caldea-assira_en.html |title=Guidelines for admission to the Eucharist between the Chaldean Church and the Assyrian Church of the East |publisher=Vatican.va |access-date=8 September 2015 |url-status=dead |archive-url=https://web.archive.org/web/20151103164736/https://www.vatican.va/roman_curia/pontifical_councils/chrstuni/documents/rc_pc_chrstuni_doc_20011025_chiesa-caldea-assira_en.html |archive-date=3 November 2015 }}</ref> "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".<ref name=Guidelines/>