Code of Federal Regulations Title 43. Public Lands:  Interior § 43.3809.331 Under what conditions must I modify my notice?

(a) You must modify your 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.