Preamble: I have posted this question in the L&S Forum because the crux of my question concerns fulfilling my Sunday obligation as a Latin Catholic. No parts of this post are intended to offend non-Catholic Christians; I am just asking some technical questions.
I know that as a Latin Catholic I can fulfil my Sunday obligation:
*]On Saturday evening or any time on Sunday;
*]In any one of the 23 sui iuris Catholic Churches in communion with the Roman Pontiff;
*]In any liturgical Rite or Use of any of the Churches in no. 2 (above);
*]Whatever the Mass is celebrating: a Sunday, solemnity, baptism, confirmation, wedding, etc.
I know that I could not fulfil my obligation by any form of worship service in any member of the Anglican Communion or any Protestant ecclesial community.
I have read on some occasions on posts on CAF that Sunday obligation can be fulfilled in Orthodox Churches. I believe this to be incorrect. Purely on a point of technicality aren’t we in the Catholic Church still in schism with the Assyrian Church, Eastern Orthodox Churches, and the Oriental Orthodox Churches? Therefore, how could we fulfil our Sunday obligation in an Eastern Orthodox Church?
As it often comes up in similar posts what is the position between the 23 Catholic Churches and the Assyrian Church, Eastern Orthodox Churches, and the Oriental Orthodox Churches concerning sacraments? Does the Catholic Church allow us to receive sacraments from these Churches? Will the Catholic Church allow members of these Churches to receive sacraments in the Catholic Church?
sui iuris and the 22 Eastern Catholic Churches sui iuris in full communion with the Latin Bishop of Rome.]