13 Concerning, therefore the conduct to follow, since the number of priests is not equally limited in every State, nor the rights of the Ecclesiastical Hierarchy everywhere equally disregarded, it is evident that, according to the different application of the unhappy decrees, different likewise must be the conduct of the Church and the Catholics. Here it seems just to pay a special tribute of praise to those Mexican Bishops who, according to advices received, have wisely interpreted the instructions We have inculcated time and again. To this We wish to call attention; for if some persons, urged rather by zeal for the defence of their own faith than by the prudence so necessary in delicate situations, may from diverse conduct in diverse circumstances have imagined contradictory judgments on the part of the Bishops, let them now be certain that such an accusation is utterly unfounded. Nevertheless, since any restriction whatever of the number of priests is a grave violation of divine rights, it will be necessary for the Bishops, the clergy, and the Catholic laity to continue to protest with all their energy against such violation, using every legitimate means. For even if these protests have no effect on those who govern the country, they will be effective in persuading the faithful, especially the uneducated, that by such action the State attacks the liberty of the Church, which liberty the Church can never renounce, no matter what may be the violence of the persecutors.
Source: Acerba Animi (Vatican.va)