Versions of Missouri Laws 393.1506 - Establishment of or change to WSIRA for recovery of appropriate pretax .. on LawServer 2024 Missouri Laws 393.1506 – Establishment of or change to WSIRA for recovery of appropriate pretax .. 2023 Missouri Laws 393.1506 – Establishment of or change to WSIRA for recovery of appropriate pretax .. 2022 Missouri Laws 393.1506 – Establishment of or change to WSIRA for recovery of appropriate pretax ..