US lawWashingtonRegulationsTitle 296 — LABOR AND INDUSTRIES, DEPARTMENT OFChapter 296-20 — MEDICAL AID RULES296-20-390WAC 296-20-390WAC 296-20-390. Air passage impairmentsLast amended: 1974Year: 2026Length: 24 wordsOfficial source (1) Rule for evaluation of permanent air passage impairments: (a) Categories 2, 3, 4 and 5 include the presence of complaints of whatever degree.PreviousWAC 296-20-385NextWAC 296-20-400