§1. Juridic persons in the Church are either aggregates of persons (universitates personarum) or aggregates of things (universitates rerum).
§2. An aggregate of persons (universitas personarum), which can be constituted only with at least three persons, is collegial if the members determine its action through participation in rendering decisions, whether by equal right or not, according to the norm of law and the statutes; otherwise it is non-collegial.
§3. An aggregate of things (universitas rerum), or an autonomous foundation, consists of goods or things, whether spiritual or material, and either one or more physical persons or a college directs it according to the norm of law and the statutes.
Source: Code of Canon Law (Vatican.va)