MSHA - Code of Federal Regulations - 30 CFR 28.33
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MSHA - Title 30 CFR
30 CFR § 28.33
Quality control test methods, equipment, and records; review by MSHA; revocation of approval.


(a) MSHA reserves the right to have its representatives inspect the applicant's quality control test methods, equipment, and records, and to interview any employee or agent of the applicant in regard to quality control test methods, equipment, and records.

(b) MSHA reserves the right to revoke, for cause, any certificate of approval where it finds that the applicant's quality control test methods, equipment, or records do not ensure effective quality control over the fuse for which the approval was issued.

Subpart E--Construction, Performance, and Testing Requirements