30 CFR §77.1901-1 — -1 Methane and oxygen deficiency tests; approved devices.
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Tests for oxygen deficiency shall be made with a permissible flame safety lamp or other means approved by the Secretary, and tests for methane shall be made with a methane detector approved by the Secretary.