Canons 298 - 329 - possibilities
Canon 298 §1 In the Church there are associations that are distinct from institutes of consecrated life and societies of apostolic life. In these associations, Christ's faithful, whether clerics or laity, or clerics and laity together, strive with a common effort to foster fullness of life, or to promote public worship or Christian teaching. They may also devote themselves to other works of the apostolate, such as initiatives for evangelization, works of piety or charity, and those which animate the temporal order with the Christian spirit.
Canon 299 §1 By private agreement among themselves, Christ's faithful have the right to constitute associations for the purposes mentioned in can. 298 §1, without prejudice to the provisions of can. 301 §1.
Canon 301 §1 It is for the competent ecclesiastical authority alone to establish associations of Christ's faithful which intend to impart Christian teaching in the name of the Church or to promote public worship, or which are directed to other ends whose pursuit is of its nature reserved to the same ecclesiastical authority.
Canon 303 Associations whose members live on their own but share in the spirit of some religious institute, under the overall direction of the same institute, and who lead an apostolic life and strive for Christian perfection, are known as third orders, or are called by some other suitable title.