US lawArizonaRegulationsTitle 11 — MinesChapter 1 — State Mine InspectorR11-1-521R11-1-521R11-1-521. Welding operations shielded and properly ventilatedLast amended: 1980Length: 8 wordsOfficial source Cite as Ariz. Admin. Code § R11-1-521Welding operations shall be shielded and properly ventilated.PreviousR11-1-520NextR11-1-522