This is slightly off topic, but remember my Russian Orthodox friend I mentioned in an earlier post? Here in Newfoundland we have no Orthodox Churches, chaples or even priests. My friend was wondering if he could attend a Catholic Mass and recieve the Sacraments (like confessions) from a Catholic priest. He said that they only have a Divine Liturgy here once in a while when an Orthodox priest comes in from the mainland which is like once a year.
Yes, he can. His Orthodox pastor might excommunicate him for doing so, but if he approaches of his own free will, cannon 844 applies:
Can. 844 §1. Catholic ministers administer the sacraments licitly to Catholic members of the Christian faithful alone, who likewise receive them licitly from Catholic ministers alone, without prejudice to the prescripts of §§2, 3, and 4 of this canon, and ⇒ can. 861, §2.
§2. Whenever necessity requires it or true spiritual advantage suggests it, and provided that danger of error or of indifferentism is avoided, the Christian faithful for whom it is physically or morally impossible to approach a Catholic minister are permitted to receive the sacraments of penance, Eucharist, and anointing of the sick from non-Catholic ministers in whose Churches these sacraments are valid.
§3. Catholic ministers administer the sacraments of penance, Eucharist, and anointing of the sick licitly to members of Eastern Churches which do not have full communion with the Catholic Church if they seek such on their own accord and are properly disposed. This is also valid for members of other Churches which in the judgment of the Apostolic See are in the same condition in regard to the sacraments as these Eastern Churches.
§4. If the danger of death is present or if, in the judgment of the diocesan bishop or conference of bishops, some other grave necessity urges it, Catholic ministers administer these same sacraments licitly also to other Christians not having full communion with the Catholic Church, who cannot approach a minister of their own community and who seek such on their own accord, provided that they manifest Catholic faith in respect to these sacraments and are properly disposed.
§5. For the cases mentioned in §§2, 3, and 4, the diocesan bishop or conference of bishops is not to issue general norms except after consultation at least with the local competent authority of the interested non-Catholic Church or community.
vatican.va/archive/ENG1104/__P2T.HTM
Note §3… specifically, this applies to the Eastern Orthodox, Oriental Orthodox, Assyrian Church of the East, Polish National Catholic Church.