This canon is found twice in the Juris Corpus Canonici, Gratian’s Decretum, Pars II., Causa XI., Quæst. III., Can. vj., and Can. vij. in the version of Martin Bracarensis. This version is very interesting as expanding the phrase “to execute any part of the ministry” into “to make the oblation, or to perform the morning or evening sacrifice as though he were in office just as before, etc.”