Section 3834.23 - When do I start paying the adjusted fees?(a) In the case of a CPI adjustment required by 30 U.S.C. 28j(c) , you must pay the adjusted initial maintenance and location fees when you record a new mining claim or site located on or after the September 1 that immediately follows the date BLM published its notice about the adjustment.(b) In the case of adjustments required by other statute, you must pay the adjusted initial maintenance and location fees for a new mining claim or site as provided in the statute.(c) For previously recorded mining claims and sites, you must pay the CPI-based adjusted maintenance fee on or before the September 1 that immediately follows the date BLM published its notice about the adjustment.(d) Notwithstanding 43 CFR 3830.91(a)(3) and 3830.96 , in any year in which BLM adjusts the maintenance and location fees, if you pay the fees timely, but pay an amount based on the fee in effect immediately before the adjustment was made, BLM will send you a notice, as provided in § 3830.94 , giving you 30 days in which to pay the additional amount required to meet the adjusted fees. If you do not pay the additional amount due within 30 days after the date you received the notice, you will forfeit the affected mining claims or sites.70 FR 52030, Sept. 1, 2005