The collection as a whole generally discusses legislation surrounding clerical discipline and lifestyle. For example, this set of canon law demands clerics to be very well versed in scripture and ecclesiastic law, including knowing the Apostles' Creed and the Nicene Creed verbatim. It requires clerics to be able to preach and celebrate Mass in Latin. It prohibits economic actions such as leasing property, acquiring interest on loans, and general business transactions. It also castigates those who renounce their faith for the worship of false idols, which Atto found to be a hazard to orthodoxy in his flock. As always, Atto devoted some of his efforts in canon law towards the greater good of his congregation: his collection included the requirement of clerics to bury their parishioners, and to be able to teach them both reading and writing.