48 However it is clear that in all these ways of promoting education and instruction, both public and private, the State should respect the inherent rights of the Church and of the family concerning Christian education, and moreover have regard for distributive justice. Accordingly, unjust and unlawful is any monopoly, educational or scholastic, which, physically or morally, forces families to make use of government schools, contrary to the dictates of their Christian conscience, or contrary even to their legitimate preferences.
Source: Divini Illius Magistri (Vatican.va)