US lawWashingtonRegulationsTitle 296 — LABOR AND INDUSTRIES, DEPARTMENT OFChapter 296-150P — RECREATIONAL PARK TRAILERS296-150P-0320WAC 296-150P-0320WAC 296-150P-0320. How do I apply for design-plan approval?Last amended: 1997Year: 2026Length: 11 wordsOfficial source Upon request, we will send you a design-plan approval request form.PreviousWAC 296-150P-0315NextWAC 296-150P-0330