This document establishes the regulatory framework and operational standards for the licensing and conduct of London taxi cabs as of 1990. The text serves as a formal statutory instrument issued by the British government to govern the professional conduct, vehicle requirements, and fare structures for the iconic black cab fleet. It provides the legal basis for the Public Carriage Office to oversee the safety and accessibility of the city's primary point-to-point transit system.

Legal scholars and transport historians view this document as a foundational reference for understanding the evolution of London's regulated taxi industry. Readers often note the technical density of the prose, which reflects the formal language characteristic of British statutory instruments from this period.