This document establishes the specific legal commencement date for the implementation of Unitary Development Plans within the jurisdictions of Greater London, Bradford, and Barnsley. The order is issued by the relevant government authority under the powers granted by the Town and Country Planning Act 1990. It serves as a formal instrument to transition local planning frameworks into a unified statutory system.

Legal professionals and urban planners utilize this document as a foundational reference for establishing the timeline of statutory planning compliance. It is a technical instrument intended for administrative record-keeping and regulatory verification.