CFR›Title 42›Chapter I›Part 84›Subpart A ContainsSections 84.1–84.3CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Subpart A—General Provisions Sections 84.1 § 84.1 Purpose. 84.2 § 84.2 Definitions. 84.3 § 84.3 Respirators for mine rescue or other emergency use in mines. Next Appendix A to Part 84 Appendix A to Part 84—Annual (Fixed) Respirator Certification Fees