ICAO Annex 3 Meteorological Services for International Air Navigation Ed20
Part I — Core SARPs.
Part II — Appendices and Attachments.
This Annex comprises the Standards, Recommended Practices and certain guidance material governing the provisionof meteorological services to international air navigation.
20th edition, incorporating Amendments 1–78. July 2018
Amendment 77-B (applicable 5/11/20)
Corrigendum No.1 - 30/11/18
Amendment 79 - 20/7/20
Amendment 80 - 30/9/20