; (ii) to request the assistance (including personnel and facilities) of other agencies and departments of the United States, whose heads may make such assistance available to the Commission with or without reimbursement; and (iii) to prepare and establish the budget of the Commission and to make budget requests to the President, the Director of the Office of Management and Budget, and Congress. (B) Other powers The Chair of the Commission shall have the power— (i) to require by special or general orders, any person to submit, under oath, such written reports and answers to questions as the Chair may prescribe; (ii) to administer oaths or affirmations; (iii) to require by subpoena, signed by the Chair, the attendance and testimony of witnesses and the production of all documentary evidence relating to the execution of its duties; (iv) in any proceeding or investigation, to order testimony to be taken by deposition before any person who is designated by the Chair, and shall have the power to administer oaths and, in such instances, to compel testimony and the production of evidence in the same manner as authorized under clause (iii); and (v) to pay witnesses the same fees and mileage as are paid in like circumstances in the courts of the United States. (2) Powers assigned to Commission The Commission shall have the power— (A) to initiate (through civil actions for injunctive, declaratory, or other appropriate relief), defend (in the case of any civil action brought under section 309(a)(8) of this Act) or appeal any civil action in the name of the Commission to enforce the provisions of this Act and chapter 95 and chapter 96 of the Internal Revenue Code of 1954, through its general counsel; (B) to render advisory opinions under section 308 of this Act