DOT adopts permits 12412 & 11646: Less renewals, same safety.
Published Date: 8/4/2026
Rule
Summary
PHMSA is amending the Hazardous Materials Regulations to adopt the provisions of U.S. Department of Transportation (DOT) special permit (SP) 12412 and DOT SP 11646. These amendments will provide greater regulatory flexibility and eliminate the need for special permit renewal requests, reducing paperwork burdens and facilitating commerce while maintaining an equivalent level of safety.
Analyzed Economic Effects
5 provisions identified: 3 benefits, 2 costs, 0 mixed.
Unload IBCs and Drums On-Vehicle
Starting September 3, 2026, persons transporting specified hazardous liquids by motor vehicle may discharge (unload) certain drums, intermediate bulk containers (IBCs), and DOT-spec 57 portable tanks without first removing the package from the vehicle, subject to the rule's conditions. The change adopts DOT special permits 12412 and 11646 into 49 CFR 177.834 and removes the prior requirement to remove packages from vehicles before discharge.
Safety Conditions and Operational Limits
The rule requires safety controls when unloading on-vehicle: shipments must be attended by a qualified person during unloading, packages may not be manifolded together, hoses must not remain attached during transport, and specific IBC design types are authorized. For IBCs, transportation is limited to private or contract motor vehicles and no more than two IBCs (each ≤ 1,703 L / 450 gallons) may be transported together when certain materials (e.g., hypochlorite solutions and fluorosilicic acid) are present.
Paperwork and Special Permit Burden Reduced
PHMSA eliminated the need to renew the referenced special permits and estimates an annual reduction of 77 respondents and 77 annual responses, saving 115 burden hours (annual burden cost: $0). PHMSA also states these changes produce cost savings to the Federal Government (and taxpayers) by reducing special permit processing.
Rule Does Not Authorize Gasoline Mobile Refueling
PHMSA amended 49 CFR 177.834(h)(1) to specify that the adopted provisions do not apply to petroleum distillate fuels; gasoline (a Class 3 Packing Group II material) is not authorized under the new on-vehicle discharge provisions. PHMSA states it does not intend this rule to justify mobile refueling platforms using IBCs for gasoline.
Federal Preemption of Some State Rules
The final rule amends requirements covered in handling and packing and would preempt State, local, and Tribal requirements that are not 'substantively the same' as the Federal hazardous materials transportation rules in those areas. The preemptive effect is limited to the minimum necessary to achieve the Federal objectives described in the rule.
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Key Dates
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