This order establishes the specific commencement date for the application of the Town and Country Planning Act 1971 within the administrative area of Northumberland. The document is issued by the government of Great Britain to enact legislative provisions regarding land use, development control, and local planning authority responsibilities. It serves as a formal instrument of statutory law, detailing the legal transition of planning powers to the specified regional jurisdiction.

Legal professionals and researchers utilize this document as a primary source for verifying the historical timeline of legislative implementation in the United Kingdom. Experts note that such instruments are highly technical and intended strictly for administrative and legal reference purposes.