Diligence requirements
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
The TCRs in each commercial recovery permit must include provisions to assure diligent development consistent with § 971.503, including a requirement that recovery at commercial scale be underway within ten years from the date of permit issuance unless that deadline is extended by the Administrator for good cause.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.