If a religious has been ordained as a deacon, a priest or a bishop, he also belongs to the clergy and so is a member of what is called the "religious clergy" or the "regular clergy". Clergy who are not members of a religious institute are known as secular clergy. They generally serve a geographically defined diocese or a diocese-like jurisdiction such as an apostolic vicariate or personal ordinariate, and so are also referred to as diocesan clergy. A religious who has not been ordained is a member of the laity, not of the clergy. However, once any non-ordained religious professes vows, especially final vows, they must be formally dispensed from those vows, which is a lengthy and formal process, with set procedures, that involves their local superior, the local Bishop or other Ordinary, the head of the Order, and the Vatican's Congregation for Religious. If they are ordained, they must also be formally suspended from and then relieved of their duties, and then laicized, which is a related but separate matter. Both laicization and dispensation of vows are only done for very serious reasons, except for perhaps when one seeks to get married once it is done. The process is even more complex if they are accused of a secular or ecclesiastical offense or crime. The state of a non-ordained religious, therefore, is not precisely the same as a lay unmarried person who is not a religious. While the state of consecrated life is neither clerical or lay, institutes themselves are classified as one or the other. A clerical institute is one that "by reason of the purpose or design intended by the founder or by virtue of legitimate tradition, is under the direction of clerics, assumes the exercise of sacred orders, and is recognized as such by the authority of the Church". In clerical institutes, such as the Dominican Order or the Jesuits, most of the members are clerics. In only a few cases do lay institutes have some clergy among their members.
Canon law
The Code of Canon Law devotes to religious 103 canons arranged in eight chapters:
Religious houses and their erection and suppression
The governance of institutes
The admission of candidates and the formation of members
The obligations and rights of institutes and their members
In the Lutheran Churches, religious are defined as those who make religious vows before their bishop to live consecrated life, especially in a religious order. An ordained priest who is not a part of a Lutheran religious order is considered 'secular', rather than 'religious'.
Anglicanism
In the Anglican Communion, the religious are those who have taken "vows of poverty, chastity, and obedience, usually in community".