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As mandated by the Moving Ahead for Progress in the 21st Century Act (MAP-21 33012(c) and (d)), PHMSA will amend the Hazardous Materials Regulations (HMR; 49 CFR parts 171-180) to adopt provisions contained in certain widely-used or long-standing special permits that have an established safety record. This rulemaking action is intended to provide wider access to the regulatory flexibility offered in special permits and eliminate the need for numerous renewal requests. The rulemaking action will also reduce paperwork burdens and facilitate commerce while maintaining an appropriate level of safety. PHMSA conducted an extensive analysis of active special permits and those special permits deemed suitable will be adopted into the HMR.