CFR › Title 43 › Part 3604 › §3604.1343 CFR §3604.13Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkBLM will not issue a free use permit if we determine that you own or control an adequate supply of suitable mineral materials that:(a)Are readily available, and(b)You can mine in a manner that is economically and environmentally acceptable.