From the beginning of the 3rd century, there is evidence in Western Christianity of the existence of what became the four minor orders (acolytes, exorcists, doorkeepers, and readers), as well as of cantors and fossores (tomb diggers).
[1] However, the 1917 Code of Canon Law laid down that nobody was to be given clerical tonsure, which had to be received before minor orders, before beginning the regular course of theological studies.
[1] Today, a man who receives what were previously called minor orders is not yet a cleric, since today one becomes a cleric only upon ordination to the diaconate,[8] a rule that applies even to members of institutes authorized to observe the 1962 form of the Roman Rite,[9] such as the Priestly Fraternity of Saint Peter and others under the care of the Pontifical Commission Ecclesia Dei, regarding, however, only the incardination of members within the institute or society.
[13] By Pope Paul VI's motu proprio Ministeria quaedam of 15 August 1972, the term "minor orders" has been replaced by that of "ministries".
[21] In the Latin Church, the lay ministries of acolyte and lector, may be entrusted to all suitable faithful, whether male or female, per CIC Canon 230 §2.
[1] The 23 sui iuris Eastern Catholic Churches in union with Rome have their traditional minor orders, governed by their own particular law.
[25] In all Eastern Catholic Churches, subdeacons are minor clerics, since admission to major orders is by ordination as deacon.
[28] Eastern Orthodox Churches routinely confer the minor orders of reader and subdeacon, and some jurisdictions also ordain cantors.
Ordination to minor orders is performed outside the sanctuary and at any communal worship service, but always outside the context of actual Divine Liturgy.