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Final rule.

PHMSA is amending the Hazardous Materials Regulations (HMR) by streamlining the classification and approval process for transporting certain low-hazard fireworks, revising the criteria for small arms cartridges to include tracer ammunition as eligible for self- classification, designating the PHMSA portal as the sole method to submit applications for all explosives approvals, and authorizing voluntary termination of an explosive approval by the approval holder.

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