§57.22222. Ventilation materials (I-A, I-B, I-C, II-A, III, V-A, and V-B mines).
30 C.F.R. § 57.22222
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.
Notes, amendments, and revision history
Amendments
[54 FR 30508, July 20, 1989]
Authority
Authority: 30 U.S.C. 811.
Source
Source: 52 FR 24941, July 1, 1987, unless otherwise noted.
Authority
Authority: 30 U.S.C. 811.
Source
Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.
Amendments
[54 FR 30508, July 20, 1989]