(1) In general The senior official appointed under subsection (a) may
(A) have access to all records, reports, audits, reviews, documents, papers, recommendations, and other materials available to the Department that relate to programs and operations with respect to the responsibilities of the senior official under this section;
(B) make such investigations and reports relating to the administration of the programs and operations of the Department as are, in the senior officials judgment, necessary or desirable;
(C) subject to the approval of the Secretary, require by subpoena the production, by any person other than a Federal agency, of all information, documents, reports, answers, records, accounts, papers, and other data and documentary evidence necessary to performance of the responsibilities of the senior official under this section; and
(D) administer to or take from any person an oath, affirmation, or affidavit, whenever necessary to performance of the responsibilities of the senior official under this section.