Versions of See prior versions of a law on LawServer 2023 Washington Code 78.52.280 – Determining market demand — No undue discrimination in proration of “allowable.” 2022 Washington Code 78.52.280 – Determining market demand–No undue discrimination in proration of “allowable.” 2020 Washington Code 78.52.280 – Determining market demand — No undue discrimination in proration of “allowable.” 2019 Washington Code 78.52.280 2018 Washington Code 78.52.280 – Determining market demand — No undue discrimination in proration of “allowable.” 2016 Washington Code 78.52.280 – Determining market demand–No undue discrimination in proration of “allowable.” 2015 Washington Code 78.52.280 – Determining market demand–No undue discrimination in proration of “allowable.” 2014 Washington Code 78.52.280 – Determining market demand — No undue discrimination in proration of “allowable.” 2013 Washington Code 78.52.280 – Determining market demand — No undue discrimination in proration of “allowable.” 2009 Washington Code 78.52.280 – Determining market demand — No undue discrimination in proration of “allowable.”