Versions of Missouri Laws 579.155 - Possession of prescription medication on school property -- exceptions -- penalty on LawServer 2023 Missouri Laws 579.155 – Possession of prescription medication on school property — exceptions — penalty 2022 Missouri Laws 579.155 – Possession of prescription medication on school property — exceptions — penalty. 2020 Missouri Laws 579.155 – Possession of prescription medication on school property — exceptions — penalty. 2018 Missouri Laws 579.155 – Possession of prescription medication on school property — exceptions — penalty. 2016 Missouri Laws 579.155 – Beginning January 1, 2017–Possession of prescription medication on school property–exceptions–penalty 2015 Missouri Laws 579.155 – Beginning January 1, 2017–Possession of prescription medication on school property–exceptions–penalty 2014 Missouri Laws 579.155 – Beginning January 1, 2017–Possession of prescription medication on school property–exceptions–penalty