US lawWashingtonRegulationsTitle 480 — UTILITIES AND TRANSPORTATION COMMISSIONChapter 480-85 — ELECTRIC AND NATURAL GAS COST OF SERVICE480-85-020WAC 480-85-020WAC 480-85-020. ApplicabilityLast amended: 2020Year: 2026Length: 24 wordsOfficial source The rules in this chapter apply to any person or party who files a cost of service study in any proceeding before the commission.PreviousWAC 480-85-010NextWAC 480-85-030