(a) You must modify your notice—
- (1) If BLM requires you to do so to prevent unnecessary or undue degradation; or
- (2) If you plan to make material changes to your operations. Material changes are changes that disturb areas not described in the existing notice; change your reclamation plan; or result in impacts of a different kind, degree, or extent than those described in the existing notice.
- (b) You must submit your notice modification 15 calendar days before making any material changes. If BLM determines your notice modification is complete before the 15-day period has elapsed, BLM may notify you to proceed. When BLM requires you to modify your notice, we may also notify you to proceed before the 15-day period has elapsed to prevent unnecessary or undue degradation.