On the Use of Vernacular Language in the Publication of the Books of the Roman Liturgy Background. On 4 December 1963 the fathers of the Second Vatican Council approved the Constitution on the Sacred Liturgy, Sacrosanctum Concilium. In order to facilitate the implementation of the Liturgical renewal desired by the Council Fathers, the Holy See has subsequently published five document of special importance, each successively numbered as an "Instruction for the Right Application of the Constitution on the Sacred Liturgy of the Second Vatican Council" The first of these, Inter Oecumenici, was issued by the Sacred Congregation of Rites and the "Consilium" for the Implementation of the Liturgy Constitution on 26 September 1964, and contained initial general principles for the orderly carrying out of the Liturgical renewal. Three years later, on 4th May 1967, a second Instruction was issued, Tresabbinc annos. This described further adaptations to the Order of Mass, The third Instruction, Liturgicae instraurationes, of 5 September 1970, was issued by the Sacred Congregation for Divine Worship, the body that succeeded the Sacred Congregation of Rites and the "Consilium" It provided directives on the central role of the Bishop in the renewal of the Liturgy throughout the diocese.