20 Religious communities should continue to maintain and fulfill the ministries proper to them. In addition, after considering the needs of the Universal Church and individual dioceses, they should adapt them to the requirements of time and place, employing appropriate and even new programs and abandoning those works which today are less relevant to the spirit and authentic nature of the community. The missionary spirit must under all circumstances be preserved in religious communities. It should be adapted, accordingly, as the nature of each community permits, to modern conditions so that the preaching of the Gospel may be carried out more effectively in every nation.
Source: Perfectae Caritatis (Vatican.va)