US lawWashingtonRegulationsTitle 51 — ENTERPRISE SERVICES, DEPARTMENT OF (BUILDING CODE COUNCIL)Chapter 51-52 — STATE BUILDING CODE ADOPTION AND AMENDMENT OF THE 2021 EDITION OF THE INTERNATIONAL MECHANICAL CODE51-52-001WAC 51-52-001WAC 51-52-001. AuthorityLast amended: 2004Year: 2026Length: 11 wordsOfficial source These rules are adopted under the authority of chapter 19.27 RCW.NextWAC 51-52-002