Annex 17 contains Standards and Recommended Practices concerned with the security of international air transport and is amended regularly to address the evolving threat. A comprehensive document for implementation of security measures, it incorporates an attachment of extracts from other Annexes, the Technical Instructions for the Safe Transport of Dangerous Goods by Air (Doc 9284), and Procedures for Air Navigation Services, focussing on action to be taken by States to prevent unlawful interference with civil aviation, or when such interference occurs