§1. All public or private associations of the Christian faithful, by whatever title or name they are called, are to have their own statutes which define the purpose or social objective of the association, its seat, government, and conditions required for membership and which determine the manner of its acting, attentive, however, to the necessity or advantage of time and place.
§2. They are to choose a title or name for themselves adapted to the usage of time and place, selected above all with regard to their intended purpose.
Source: Code of Canon Law (Vatican.va)