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The purpose of these norms is to ensure the reverent and careful distribution of Holy Communion under both kinds.
Norms established by the diocesan bishop must be observed wherever the Eucharist is celebrated in the diocese, "even in the churches of religious orders and in celebrations with small groups."
The norms and directives established by the Church for the celebration of any liturgical rite always have as their immediate goal the proper and careful celebration of those rites.
In sociology, a norm, or social norm, is a rule that is socially enforced.
Norms with common sense origins may, over time, lose their original context as society changes: an action that was once performed because it was necessary to survive may over the years become a social norm, even once the circumstances that made it necessary for survival are no longer applicable.
As a series of examples that are under tremendous contemporary pressure as norms evolve: the term "lover" once was presumed to denote a person of the opposite sex; a "mature" adult once was presumed to be or have been married; and a "couple" once was presumed to have or want children.