ICAO normative document

generate a one-sentence description for a given conceptual class.
# Response Format
Return only the sentence: "Description: [one-sentence description of the conceptional class]"

Class: ICAO normative document

An ICAO normative document is an official publication issued by the International Civil Aviation Organization that establishes binding or recommended international standards, procedures, and guidance for civil aviation safety, security, efficiency, and environmental protection.