Find accurate definitions of over 5,000 Catholic terms and phrases (including abbreviations). Based on Fr. John Hardon's Modern Catholic Dictionary, © Eternal Life. Used with permission.
Instruction of the Sacred Congregation for Divine Worship, calling attention to the Church's liturgical norms and warning against abuses since the Second Vatican Council. Its most explicit directive states that "the liturgical texts composed by the Church . . . deserve the greatest respect. No one on his own authority may make changes, substitutions, additions, or deletions in them" (September 5, 1970).