This document establishes the specific commencement date for the Gun Barrel Proof Act of 1978. The order serves as a formal instrument of the British government to enact statutory provisions regarding the testing and certification of firearm barrels. It functions as a procedural mechanism to bring legal requirements into force within the jurisdiction of Great Britain.

Legal professionals and historians utilize this document as a primary source for tracking the legislative history of British firearms regulation. It is a technical, administrative text intended for reference within legal archives and government records.