StacksVerified U.S. regulatory reference

30 CFR §75.1711-3

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The openings of all mines not declared by the operator, to be inactive, permanently closed, or abandoned for less than 90 days shall be adequately fenced or posted with conspicuous signs prohibiting the entrance of unauthorized persons.