StacksVerified U.S. regulatory reference

30 CFR §57.22222

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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.