30 C.F.R. § 57.22222 Ventilation materials (I-A, I-B, I-C, II-A, III, V-A, and V-B mines).
Title 30 - Mineral Resources
Brattice cloth and ventilation tubing shall be approved by MSHA in accordance with 30 CFR part 7, or shall bear a BC or VT acceptance number issued by the MSHA Approval and Certification Center. [54 FR 30508, July 20, 1989]
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart T—Safety Standards for Methane in Metal and Nonmetal Mines
Ventilation
§ 57.22222 Ventilation materials (I-A, I-B, I-C, II-A, III, V-A, and V-B mines).
