2024 14 CFR 139.307 – Unpaved areas

2023 14 CFR 139.307 – Unpaved areas

2022 14 CFR 139.307 – Unpaved areas

2021 14 CFR 139.307 – Unpaved areas

2020 14 CFR 139.307 – Unpaved areas

2019 14 CFR 139.307 – Unpaved areas

2015 14 CFR 139.307 – Unpaved areas

2014 14 CFR 139.307 – Unpaved areas

2010 14 CFR 139.307 – Unpaved areas

2009 14 CFR 139.307 – Unpaved areas