Apostolic Letter issued Motu proprio by the Supreme Pontiff Francis Ab Initio amending Can. 435 §1 and Can. 506 §1 of the Code of Canons of the Eastern Churches - Franziskus Papst (Miller, Donna (edt), Cooney, Patrick M. (edt), Souckar, Michael A. 1962- (edt), Roman Replies and CLSA Advisory Opinions / 2021 Roman Replies and CLSA Advisory Opinions 2021, 2021)