24 Priests and Christian educators should make serious efforts to foster religious vocations, thereby increasing the strength of the Church, corresponding to its needs. These candidates should be suitably and carefully chosen. In ordinary preaching, the life of the evangelical counsels and the religious state should be treated more frequently. Parents, too, should nurture and protect religious vocations in their children by instilling Christian virtue in their hearts. Religious communities have the right to make themselves known in order to foster vocations and seek candidates. In doing this, however, they should observe the norms laid down by the Holy See and the local Ordinary. Religious should remember there is no better way than their own example to commend their institutes and gain candidates for the religious life.
Source: Perfectae Caritatis (Vatican.va)