This document establishes the legal framework for the transition of gas measurement standards to the metric system within the United Kingdom. The regulations were drafted by the British government to mandate the use of metric units in gas supply and billing, replacing imperial measurements to align with international standards. It provides the specific legal definitions and compliance requirements for gas suppliers operating under the jurisdiction of the 1980 legislative mandate.

Legal professionals and regulatory historians utilize this text as a primary source for understanding the legislative shift toward metrication in the energy sector. It is considered a technical document intended for administrative and legal reference rather than general reading.