This document establishes the legal framework for the designation of specific ports under the Prevention of Terrorism (Temporary Provisions) Act 1989. The order is issued by the British government to define the geographical scope of security controls and monitoring at designated entry points. It serves as a regulatory instrument to facilitate the enforcement of anti-terrorism measures within the United Kingdom's transport infrastructure.

Legal professionals and historians utilize this text as a primary source for understanding the evolution of UK counter-terrorism legislation during the late 20th century. It is regarded as a technical administrative document rather than a general interest text.