Versions of Oregon Statutes 431A.463 - Prohibition on requiring prior authorization of payment for substance use disorder treatment; rules on LawServer 2023 Oregon Statutes 431A.463 – Prohibition on requiring prior authorization of payment for substance use disorder treatment; rules 2021 Oregon Statutes 431A.463 – Prohibition on requiring prior authorization of payment for substance use disorder treatment; rules 2019 Oregon Statutes 431A.463 – Prohibition on requiring prior authorization of payment for substance use disorder treatment; rules