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