2024 49 CFR 172.308 – Authorized abbreviations

2023 49 CFR 172.308 – Authorized abbreviations

2022 49 CFR 172.308 – Authorized abbreviations

2021 49 CFR 172.308 – Authorized abbreviations

2020 49 CFR 172.308 – Authorized abbreviations

2019 49 CFR 172.308 – Authorized abbreviations

2016 49 CFR 172.308 – Authorized abbreviations

2015 49 CFR 172.308 – Authorized abbreviations

2014 49 CFR 172.308 – Authorized abbreviations

2010 49 CFR 172.308 – Authorized abbreviations