2024 19 CFR 146.4 – Operator responsibility and supervision

2023 19 CFR 146.4 – Operator responsibility and supervision

2022 19 CFR 146.4 – Operator responsibility and supervision

2021 19 CFR 146.4 – Operator responsibility and supervision

2020 19 CFR 146.4 – Operator responsibility and supervision

2019 19 CFR 146.4 – Operator responsibility and supervision

2016 19 CFR 146.4 – Operator responsibility and supervision

2015 19 CFR 146.4 – Operator responsibility and supervision

2014 19 CFR 146.4 – Operator responsibility and supervision