Following the fall of the Second Empire in 1867, liberal presidents Benito Juárez and his successor Sebastián Lerdo de Tejada began implementing the anti-clerical measures of the constitution. Lerdo went further, extending the laws of the Reform to formalize: separation of Church and State; civil marriage as the only valid manner for State recognition; prohibitions of religious corporations to acquire real estate; elimination from legal oaths any religious element, but only a declaration to tell the truth; and the elimination of monastic vows as legally binding. Further prohibitions on the Church in 1874 included: the exclusion of religion in public institutions; restriction of religious acts to church precincts; banning of religious garb in public except within churches; and prohibition of the ringing of church bells except to summon parishioners.