The Aviation security specifications in Annex 17 and the other Annexes are amplified by detailed guidance material contained in the security Manual for safeguarding Civil Aviation Against Acts of Unlawful Interference which was first published in 1971. This restricted document provides details of how States can comply with the various Standards and recommended Practices contained In Annex 17. The Manual has since been developed for purpose of assisting States promote safety and security in civil aviation through the development of the legal framework, practices, procedures and material, technical and human resources to prevent and, where necessary, respond to acts of unlawful interference.