30 C.F.R. § 57.22222 – Ventilation materials (I-A, I-B, I-C, II-A, III, V-A, and V-B mines). | Midpage
§ 57.22222
30 C.F.R. § 57.22222
Ventilation materials (I-A, I-B, I-C, II-A, III, V-A, and V-B mines).
Published Jul 20, 198954 FR 30508
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.