16 Since the proper use of the media of social communications which are available to audiences of different cultural backgrounds and ages, calls for instruction proper to their needs, programs which are suitable for the purpose-especially where they are designed for young people-should be encouraged, increased in numbers and organized according to Christian moral principles. This should be done in Catholic schools at every level, in seminaries and in lay apostolate groups. To speed this along catechetical manuals should present and explain Catholic teaching and regulations on this matter.
Source: Inter Mirifica (Vatican.va)