US lawWashingtonRegulationsTitle 173 — ECOLOGY, DEPARTMENT OFChapter 173-423 — CLEAN VEHICLES PROGRAM173-423-010WAC 173-423-010WAC 173-423-010. PurposeLast amended: 2021Year: 2026Length: 15 wordsOfficial source The purpose of this chapter is to establish rules as authorized by RCW 70A.30.010 .NextWAC 173-423-020