MSHA - Code of Federal Regulations - 30 CFR 75.200
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MSHA - Title 30 CFR
30 CFR § 75.200

This Subpart C sets forth requirements for controlling roof, face and ribs, including coal or rock bursts, in underground coal mines. Roof control systems installed prior to the effective date of this subpart are not affected so long as the support system continues to effectively control the roof, face and ribs.