The Rule also indicates a preoccupation to adapt to the post-conciliar reform after the IV Lateran Council of 1215. It is a known fact that Caesar was a biblical scholar. For a thorough analysis of Scripture texts in the RegNB, cfr.
Some chapters are worthy of particular attention.
Chapter 16 speaks about missionaries among non-believers. It is the first of its kind in the legislation of religious Orders in the Church. Chapter 21 is an example of the Franciscan style of preaching. Chapter 23 is a long prayer of praise and thanksgiving. The RegB is the Rule which all male Franciscans of the OFM, OFMConventual and OFMCapuchin families of the First Order profess.