This document establishes the legal amendments governing the discharge of trade effluents into public sewers within England and Wales. The text functions as a formal legislative instrument, detailing specific modifications to existing environmental standards and regulatory frameworks. It serves as a primary source for legal practitioners and environmental compliance officers tasked with interpreting the 1990 updates to water pollution control protocols.

Legal professionals and environmental historians utilize this document as a foundational record of administrative law regarding industrial waste management. It is recognized as a technical, highly specific regulatory text intended for institutional reference rather than general readership.