; and (C) to carry out any other activity described in this section. (2) Access Subject to paragraph (3) and pursuant to a cooperative agreement, the Secretary of Agriculture shall, on request, have access to all royalty or fee accounting information in the possession of the Secretary relating to the production, removal, or sale of locatable minerals from claims on Federal land. (3) Confidential information (A) In general Trade secrets, proprietary information, and other confidential information protected from disclosure under section 552 of title 5, United States Code (commonly known as the Freedom of Information Act ), shall be made available by the Secretary to other Federal agencies as necessary to ensure compliance with this Act and other Federal laws. (B) Protection by other Federal officials The Secretary, the Secretary of Agriculture, and other Federal officials shall ensure that information described in subparagraph (A) is provided protection in accordance with section 552 of title 5, United States Code. (f) Interest (1) Definition of underpayment In this subsection, the term underpayment means the difference between the royalty on the value of the production or the fee under section 403 that should have been received by the Secretary and the royalty on the value of the production or the fee under section 403 that was received by the Secretary, if the royalty or fee that should have been received is greater than the royalty or fee that was received. (2) Nonpayment and underpayment (A) Nonpayment In the case of mining claims or operations with respect to which royalty payments or the fee under section 403 are not received by the Secretary by the date that the payments are due, the Secretary shall charge interest on the nonpayment at the rate specified under subparagraph (C). (B) Underpayment In the case of an underpayment, interest shall be computed and charged only on the amount of the deficiency and not on the total amount, at the rate specified under subparagraph (C). (C) Interest rate In the case of