Versions of See prior versions of a law on LawServer 2024 Kentucky Statutes 223.160 – Operators of water treatment plant to have certificate of competency — Limited certificate of competency 2023 Kentucky Statutes 223.160 – Operators of water treatment plant to have certificate of competency — Limited certificate of competency 2022 Kentucky Statutes 223.160 – Operators of water treatment plant to have certificate of competency — Limited certificate of competency 2021 Kentucky Statutes 223.160 – Operators of water treatment plant to have certificate of competency — Limited certificate of competency 2020 Kentucky Statutes 223.160 – Operators of water treatment plant to have certificate of competency — Limited certificate of competency 2019 Kentucky Statutes 223.160 – Operators of water treatment plant to have certificate of competency — Limited certificate of competency 2017 Kentucky Statutes 223.160 – Operators of water treatment plant to have certificate of competency — Limited certificate of competency