Versions of See prior versions of a law on LawServer 2024 Missouri Laws 387.418 – Zero-tolerance intoxicating substance policy required — notice — violation, .. 2023 Missouri Laws 387.418 – Zero-tolerance intoxicating substance policy required — notice — violation, .. 2022 Missouri Laws 387.418 – Zero-tolerance intoxicating substance policy required — notice — violation, … 2020 Missouri Laws 387.418 – Zero-tolerance intoxicating substance policy required — notice — violation, … 2018 Missouri Laws 387.418 – Zero-tolerance intoxicating substance policy required — notice — violation, …