43 CFR § 3505.64
How do I apply for an extension?
June 11, 2020
There is no application form. Just send us a written request with the information in §3505.65 of this part at least 90 days before your permit expires. Include the processing fee for extensions of prospecting permits found in the fee schedule in §3000.12 of this chapter and the first year's rental in accordance with §§3504.10, 3504.15, and 3504.16 of this part.
[64 FR 53536, Oct. 1, 1999, as amended at 70 FR 58877, Oct. 7, 2005]