The most significant shift in Vatican II with regard to the apostolate was not the idea that the laity could join in it. Instead the most significant shift was the Council’s recognition that the apostolate of the laity comes not from the hierarchy but from Christ himself.
Cahoy W. In the name of the church. Collegeville, Minn.: Liturgical Press; 2012. p. 43.
While Vatican II used the language of apostolate to describe broad participation in the mission of the church, in the years after the council, this language all but disappeared. In its place came ‘lay ministry’.
Cahoy W. In the name of the church. Collegeville, Minn.: Liturgical Press; 2012. p. 44.