Versions of Tennessee Code 39-15-501 - Part definitions. [Effective until January 1, 2020. See the version effective on January 1, 2020.] on LawServer 2023 Tennessee Code 39-15-501 – Part definitions 2021 Tennessee Code 39-15-501 – Part Definitions 2020 Tennessee Code 39-15-501 – Part Definitions 2019 Tennessee Code 39-15-501 – Part definitions. [Effective until January 1, 2020. See the version effective on January 1, 2020.]