Versions of 14 CFR 1251.580 - Direct threat on LawServer 2024 14 CFR 1251.580 – Direct threat 2023 14 CFR 1251.580 – Direct threat 2022 14 CFR 1251.580 – Direct threat 2021 14 CFR 1251.580 – Direct threat 2020 14 CFR 1251.580 – Direct threat 2019 14 CFR 1251.580 – Direct threat 2016 14 CFR 1251.580 – Direct threat 2015 14 CFR 1251.580 – Direct threat