43 CFR 3601.44 - How and when may my mining or reclamation plan be modified?
(a) Either you or BLM may initiate a modification of an approved mining or reclamation plan to adjust for changed conditions or to correct any oversight. BLM will consult with you before requiring a modification.
(b) If BLM notifies you that you must modify your plan, you must prepare the modification, or explain why you need more time, within 30 days. If you fail to modify your plan to BLM's satisfaction, BLM may order you to stop operations under your contract or permit.
(c) When you ask to change an approved mining or reclamation plan for one of the reasons in paragraph (a) of this section, BLM will notify you in writing within 30 days whether we approve the modification, deny it, or require any changes in it.