Operational Directives (“Prescrizioni Operative” in Italian) are safety measures that are a firm obligation on all organisations and persons to which they are addressed.

When they deviate from Basic Regulation EU 2018/1139   and the delegated acts and implementing acts adopted on the basis thereof they are adopted in accordance with Article 70 “safeguard provisions” of such Regulation.

They are also a way of compliance with requirement ARO.GEN.135 “immediate reaction to a safety problem” of EU Regulaton “AIR OPS”.

The list of official documents could be found here, in italian language,

https://www.enac.gov.it/sicurezza-aerea/operazioni-di-volo/prescrizioni-di-sicurezza