the Secretary or the Secretary of Agriculture under this Act shall be made immediately available to the public, consistent with section 552 of title 5, United States Code, in central and sufficient locations in the county, multicounty, and State area of mineral activity or reclamation so that such items are conveniently available to residents in the area proposed or approved for mineral activities and on the Internet. 411. Miscellaneous powers (a) In general In carrying out his or her duties under this Act, the Secretary concerned may conduct any investigation, inspection, or other inquiry necessary and appropriate and may conduct, after notice, any hearing or audit, necessary and appropriate to carrying out his or her duties. (b) Ancillary powers In connection with any hearing, inquiry, investigation, or audit under this Act, the Secretary, or for National Forest System lands the Secretary of Agriculture, is authorized to take any of the following actions: (1) Require, by special or general order, any person to submit in writing such affidavits and answers to questions as the Secretary concerned may reasonably prescribe, which submission shall be made within such reasonable period and under oath or otherwise, as may be necessary. (2) Administer oaths. (3) Require by subpoena the attendance and testimony of witnesses and the production of all books, papers, records, documents, matter, and materials, as such Secretary may request. (4) Order testimony to be taken by deposition before any person who is designated by such Secretary and who has the power to administer oaths, and to compel testimony and the production of evidence in the same manner as authorized under paragraph (3) of this subsection. (5) Pay witnesses the same fees and mileage as are paid in like circumstances in the courts of the United States. (c) Enforcement In cases of refusal to obey a subpoena served upon any person under this section, the district court of the United States for any district in which such person is found, resides, or transacts