promulgation

This term carries a high degree of formality and is most frequently encountered in legal, governmental, or ecclesiastical contexts. It describes the specific moment a rule or decree transitions from a private draft to a public mandate, emphasizing the officiality and authority of the announcement.

While it can be used to describe the spread of ideas or doctrines, it differs from "propagation" or "dissemination" by implying a sense of authoritative imposition or formal establishment rather than a natural or organic spread. It suggests a top-down movement of information from a source of power to the general population.