"The Other Catholics: A Short Guide to the Eastern Catholic Churches". Retrieved The 1983 Code of Canon Law still teaches that the Church has a coercive authority over the baptized, with the authority to direct and to punish, by temporal as well as spiritual penalties, for culpable apostasy or heresy. A b O'Collins,. 53 The distinct 1990 Code of Canons of the Eastern Churches ( cceo, after the Latin initials) applies to the autonomous Eastern Catholic Churches. 148 Notably, because the church teaches that Christ is present in the Eucharist, 149 those who are conscious of being in a state of mortal sin are forbidden to receive the sacrament until they have received absolution through the sacrament of Reconciliation (Penance). 980) a b Bokenkotter,. The Fourth Crusade and the sacking of Constantinople by renegade crusaders proved the final breach. 9 10" of St Ignatius to the Smyrnaeans (c. . The last resignation occurred on 28 February 2013, when Pope Benedict XVI retired, citing ill health in his advanced age. 13 14 Of its seven sacraments the Eucharist is the principal one, celebrated liturgically in the Mass.