ICAO annexes are detailed documents that outline international aviation standards and recommended practices. Each annex covers a different aspect of aviation, such as flight safety, air traffic services, and environmental issues. There are currently 19 annexes, and they are used by member states to ensure uniformity in global aviation regulations. For example, Annex 6 focuses on aircraft operations, while Annex 14 covers airport design and operations. These annexes provide the foundation for safe, efficient, and environmentally responsible aviation worldwide.