US lawWashingtonRegulationsTitle 296 — LABOR AND INDUSTRIES, DEPARTMENT OFChapter 296-400A — PLUMBER CERTIFICATION RULES296-400A-050WAC 296-400A-050WAC 296-400A-050. When does the advisory board of plumbers meet?Last amended: 1997Year: 2026Length: 18 wordsOfficial source The advisory board of plumbers meets every quarter on the third Tuesday of January, April, July and October.PreviousWAC 296-400A-045NextWAC 296-400A-070