This final rule removes undue regulatory burdens by adopting the provisions of U.S. Department of Transportation (DOT) special permit (SP) 14175 to authorize a 10-year requalification period and the ultrasonic examination (UE) testing method for DOT specification 3A and 3AA cylinders in flammable and non-flammable, nonpoisonous gas service. This adoption reflects advances in testing technology and will relieve stakeholders of the burden of performing more frequent cylinder requalification.
Source
https://www.federalregister.gov/documents/2026/08/04/2026-15819/hazardous-materials-adoption-of-department-of-transportation-special-permit-14175Canonical document at the regulator. Always cite this URL — not the Vantage detail page — in compliance evidence.