The Council of Vatican II said that "in liturgical celebrations each person, minister or layman, who has an office to perform, should do all of, but only, those parts which pertain to his office by the nature of the rite and the principles of liturgy."
Dabere na ndokwa nke Sacrosanctum Concilium, "mmadụ ọ bụla, onye ozi ma ọ bụ onye ọrụ, onye nwere ọrụ ọ ga-arụ kwesịrị ime ihe niile, kama naanị, akụkụ ndị ahụ bụ nke ọfịs ya site n'ụdị emume nsọ na ụkpụrụ nke iwu."