May 4, 2021: Hazardous Materials: Show Cause and Procedures for Complying with UN Model Regulation Test Criteria for Specific Explosive Classification Approvals

PHMSA issued a notice to those who currently hold Explosive (EX) approvals on four specific Division 1.4S explosives. Changes have been made to the process necessary for maintaining or upgrading these approvals.
If you hold approvals on UN0349, UN0367, UN0384, and UN0481, you will now pass an additional test to maintain the 1.4S classification.

Docket No. PHMSA–2017–0108, Notice No. 2021–03

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