- Canon 284
- Clerics are to wear suitable ecclesiastical garb according to the norms issued by the conference of bishops and according to legitimate local customs.
- "The National Conference of Catholic Bishops, in accord with the prescriptions of canon 284, hereby decrees that without prejudice to the provisions of canon 288, clerics are to dress in conformity with their sacred calling.
- "In liturgical rites, clerics shall wear the vesture prescribed in the proper liturgicad books. Outside liturgical functions, a black suit and Roman collar are the usual attire for priests. The use of the cassock is at the discretion of the cleric.
- "In the case of religious clerics, the determinations of their proper institutes or societies are to be observed with regard to wearing the religious habit."