Versions of 43 CFR 431.1 - Purpose on LawServer 2024 43 CFR 431.1 – Purpose 2023 43 CFR 431.1 – Purpose 2022 43 CFR 431.1 – Purpose 2020 43 CFR 431.1 – Purpose 2019 43 CFR 431.1 – Purpose 2016 43 CFR 431.1 – Purpose 2015 43 CFR 431.1 – Purpose 2014 43 CFR 431.1 – Purpose 2010 43 CFR 431.1 – Purpose 2009 43 CFR 431.1 – Purpose