Lowering Miners' Exposure to Respirable Crystalline Silica and Improving Respiratory Protection; Delay of Effective Date of Conforming Amendments
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The Mine Safety and Health Administration (MSHA) has issued a final rule that indefinitely delays the effective date of conforming amendments to 30 CFR Parts 56 and 57 originally scheduled for April 8, 2026. These amendments were part of the 2024 Silica Rule, which lowered the permissible exposure limit for respirable crystalline silica and updated respiratory protection standards. The delay is required because the U.S. Court of Appeals for the Eighth Circuit issued a stay on April 11, 2025, halting compliance deadlines while it reviews legal challenges from industry groups. As a result, the existing exposure limits and respiratory protection requirements in sections 56.5001, 56.5005, 57.5001, and 57.5005 remain in full effect for metal and nonmetal mines until the court case is resolved.
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Key Changes
- Indefinitely delays the effective date of conforming amendments to 30 CFR Parts 56 and 57 that were scheduled to take effect on April 8, 2026
- Maintains current exposure limits and respiratory protection standards in 30 CFR 56.5001, 56.5005, 57.5001, and 57.5005
- Postpones enforcement of temporary sections 56.5001T, 56.5005T, 57.5001T, and 57.5005T until the judicial stay is lifted
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Obligations
What this law requires
Metal and nonmetal (MNM) mine operators must continue to comply with existing standards in 30 CFR 56.5001, 56.5005, 57.5001, and 57.5005 indefinitely until the Court-ordered stay is terminated
MSHA must continue to enforce existing standards in 30 CFR 56.5001, 56.5005, 57.5001, and 57.5005 indefinitely until the Court-ordered stay is terminated
MSHA must delay enforcement of conforming amendments in 30 CFR 56.5001T, 56.5005T, 57.5001T, and 57.5005T until the Court-ordered stay is terminated
MSHA must publish a document in the Federal Register announcing further action once the court-ordered stay is terminated
MSHA must report to Congress on the promulgation of this rule before its effective date in accordance with 5 U.S.C. 801