Versions of Washington Code 70A.300.400 - State preemption -- Department sole authority -- Local requirements superseded -- State authority over designated zone facilities on LawServer 2023 Washington Code 70A.300.400 – State preemption — Department sole authority — Local requirements superseded — State authority over designated zone facilities 2022 Washington Code 70A.300.400 – State preemption–Department sole authority–Local requirements superseded–State authority over designated zone facilities 2020 Washington Code 70A.300.400 – State preemption — Department sole authority — Local requirements superseded — State authority over designated zone facilities