[Modus legendi abbreviaturas]

All these [titles] have the decretals

And afterwards, so that they may be more easily held in the mind, they are collected in fifty-three metric verses. Whence note that these are the titles of the Decretals, not considering the order of the alphabet. And first of the first book, secondly of the second, and so of the others.
"Concerning the most holy Trinity and the Catholic faith" original: "de sūma trinitate et fide katholica"
"Concerning constitutions."
"Concerning rescripts."
"Concerning custom."
"Concerning the postulation of prelates."
"Concerning election and the power of the elected."
"Concerning the translation of bishops."
"Concerning the authority and use of the pallium."
"Concerning renunciation."
"Concerning the suppling of the negligence of prelates."
"Concerning the times of ordinations and the qualities of those to be ordained."
"Concerning the scrutiny in the making of orders."
"Concerning the age of the bishop who resigned or renounced the episcopacy or bishopric."
"Concerning the age and quality and of those to be promoted to orders."
"Concerning sacred anointing."
"Concerning whether sacraments are to be repeated or not."
"Concerning the sons of priests, whether to be ordained or not."
"Concerning servants not to be ordained and their manumission."
"Concerning those bound to accounting, whether to be ordained or not."
"Concerning those with bodily defects, whether to be promoted or not."

"Concerning bigamists not to be ordained."
"Concerning pilgrim clerics."
"Concerning the office of the archdeacon."
"Concerning the office of the archpriest."
"Concerning the office of the primicerius."
"Concerning the office of the sacristan."
"Concerning the office of the custodian."
"Concerning the office of the vicar."
"Concerning the office and power of the delegated judge."
"Concerning the office of the legate."
"Concerning the office of the ordinary judge."
"Concerning the office of the judge."
"Concerning majesty and obedience."
"Concerning truce and peace."
"Concerning pacts."
"Concerning transactions."
"Concerning postulation."
"Concerning procurators."
"Concerning the syndic."
"Concerning those things which are done out of fear or force."
"Concerning restitution in full."
"Concerning alienation made because of a changed judgment."
"Concerning arbitrators."
Titles of the second book

"Concerning judgments."
"Concerning the competent forum."
"Concerning the presentation of the libel."
"Concerning mutual petitions."
"Concerning the protestation of litigation."
"Concerning that one should not proceed to the reception of witnesses or to definitive sentence before the litigation is contested."
"Concerning the oath of calumny."