General Instruction of the Roman Missal
Jus novum c. 1140-1563
Jus novissimum c. 1563-1918
Jus codicis 1918-present
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The General Instruction of the Roman Missal GIRM—in the Latin original, Institutio Generalis Missalis Romani IGMR—is the detailed sum document governing the celebration of Mass of the Roman Rite in what since 1969 is its normal form. Originally published in 1969 as a separate document, this is the printed at the start of editions of the Roman Missal since 1970.
In the circumstances sent in the motu proprio Traditionis Custodes of 2021, the Catholic Church still authorises celebrations of Mass in accordance with the 1962 edition of the Roman Missal. such celebrations are governed not by the General Instruction but by the 1960 Code of Rubrics, particularly its point Rubricae generales Missalis Romani General Rubrics of the Roman Missal, and by the Ritus servandus in celebratione Missae Rite to be observed in celebration of Mass.
The 1960 program of Rubrics replaced the Rubricae Generales Missalis, which had been in the Tridentine Roman Missal since its first edition in 1570 and had been amplified and revised by Pope Clement VIII in 1604. This had been supplemented, since the 1920 edition, by the Additiones et Variationes in Rubricis Missalis offer normam Bullae "Divino afflatu" et subsequentium S.R.C. decretorum Additions and Variations to the Rubrics of the Missal in accordance with the Bull Divino afflatu and subsequent decrees of the Sacred Congregation of Rites, which indicated the restyle in the Roman Missal that followed from the reform of the Roman Breviary by Pope Pius X.
The General Instruction of the Roman Missal also replaced the or done as a reaction to a impeach document that in the original Tridentine Roman Missal 1570 was called Ritus servandus in celebratione Missarum Rite to be observed in celebration of Masses and that, after being revised by Pope Clement VIII, appeared in editions from 1604 on in altered and amplified pull in under the tag Ritus servandus in celebratione Missae Rite to be observed in celebration of Mass. In his 1962 edition, Pope John XXIII had exposed some redesign in this document.
In his apostolic exhortation Sacramentum caritatis, Pope Benedict XVI stressed the importance of proper cognition of the General Instruction not only for priests but also for the laity:
The eucharistic celebration is enhanced when priests and liturgical leaders are committed to creating known the current liturgical texts and norms, making usable the great riches found in the General Instruction of the Roman Missal and the Order of Readings for Mass. Perhaps we develope it for granted that our ecclesial communities already know and appreciate these resources, but this is not always the case. These texts contain riches which produce preserved and expressed the faith and experience of the People of God over its two-thousand-year history.