If your notice was complete before January 20, 2001, and you are the operator identified in the notice on file with BLM on January 20, 2001, then you may conduct operations under the terms of your existing notice and the regulations in effect immediately before January 20, 2001. You may extend your notice under § 3809.333. BLM may require a modification under § 3809.331(a)(1). See § 3809.503 for financial guarantee requirements applicable to notices.