Any action that the Secretary is authorized to take pursuant to the Order and any further executive orders relating to the national emergency declared in the Order may be taken by the Assistant Secretary of the Treasury for Investment Security or their designee or by any other person to whom the Secretary has delegated the authority so to act, as appropriate.

(a) Except as otherwise provided by law, and in consultation with the Secretary of Commerce and, as appropriate, the heads of other relevant agencies, the Secretary may amend, modify, or revoke provisions of this part at any time.

(b) Except as otherwise provided by law, any instructions, orders, forms, regulations, or rulings issued pursuant to this part may be amended, modified, or revoked at any time.

(c) Unless otherwise specifically provided, any amendment, modification, or revocation of any provision in or appendix to this part does not affect any act done or omitted, or any civil or criminal proceeding commenced or pending, prior to such amendment, modification, or revocation. All penalties, forfeitures, and liabilities under any such instructions, orders, forms, regulations, or rulings pursuant to this part continue and may be enforced as if such amendment, modification, or revocation had not been made.

The provisions of this part are separate and severable from one another. If any of the provisions of this part, or the application thereof to any person or circumstance, is held to be invalid, such invalidity shall not affect other provisions or application of such provisions to other persons or circumstances that can be given effect without the invalid provision or application.

(a) Any person is required to furnish under oath, in the form of reports or otherwise, at any time as may be required by the Department of the Treasury, complete information regarding any act or transaction subject to the provisions of this part, regardless of whether such act or transaction is effected pursuant to a national interest exemption under § 850.502. Except as provided otherwise, the Department of the Treasury may, through any person or agency, conduct investigations, hold hearings, administer oaths, examine witnesses, receive evidence, take depositions, and require by subpoena the attendance and testimony of witnesses and the production of any books, contracts, letters, papers, and other hard copy or electronic documents relating to any matter under investigation, regardless of whether any report has been required or filed under this section.

(b) For purposes of paragraph (a) of this section, the term document includes any written, recorded, or graphic matter or other means of preserving thought or expression (including in electronic format), and all tangible things stored in any medium from which information can be processed, transcribed, or obtained directly or indirectly.

(c) Persons providing documents to the Department of the Treasury pursuant to this section must do so in a usable format agreed upon by the Department of the Treasury.