The 1996 "Instruction for Applying the Liturgical Prescriptions of the Code of Canons of the Eastern Churches" brought together, in one place, the developments that took place in previous texts, and is "an expository expansion based upon the canons, with constant emphasis upon the preservation of Eastern liturgical traditions and a return to those usages whenever possible—certainly in preference to the usages of the Latin Church, however much some principles and norms of the conciliar constitution on the Roman rite, "in the very nature of things, affect other rites as well." The "Instruction" states: