Versions of Tennessee Code 9-21-405 - Definition of “period.” on LawServer 2023 Tennessee Code 9-21-405 – Definition of “period.” 2021 Tennessee Code 9-21-405 – Definition of “period.” 2020 Tennessee Code 9-21-405 – Definition of “period.” 2019 Tennessee Code 9-21-405 – Definition of “period.” 2010 Tennessee Code 9-21-405. Definition of “period.” —