It follows Pope John Paul II's 2003 encyclical, Ecclesia de Eucharistia calling for an Instruction on the liturgical norms.
[1] As its reason for issuing the document, the congregation stated: It is not possible to be silent about the abuses, even quite grave ones, against the nature of the Liturgy and the Sacraments as well as the tradition and the authority of the Church, which in our day not infrequently plague liturgical celebrations in one ecclesial environment or another.
On the contrary, anyone who acts thus by giving free rein to his own inclinations, even if he is a Priest, injures the substantial unity of the Roman Rite, which ought to be vigorously preserved, and becomes responsible for actions that are in no way consistent with the hunger and thirst for the living God that is experienced by the people today.
Nor do such actions serve authentic pastoral care or proper liturgical renewal; instead, they deprive Christ's faithful of their patrimony and their heritage.
For example, it made clear that "Girls or women may also be admitted to this service of the altar, at the discretion of the diocesan Bishop and in observance of the established norms".