; travel expenses Members of the Commission shall serve without pay, but each member shall receive travel expenses, including per diem in lieu of subsistence, in accordance with applicable provisions under subchapter I of chapter 57 of title 5, United States Code. (4) Deadline for appointment The members of the Commission shall be appointed not later than 45 days after the date of the enactment of this Act. (5) Co-chairs Not later than 10 days after the first meeting of the Commission, the members of the Commission shall select 2 co-chairs from among the members. (d) Powers (1) Hearings and sessions The Commission may, for the purpose of carrying out this Act, hold hearings, sit and act at times and places, take testimony, and receive evidence as the Commission considers appropriate, except that the Commission shall hold its initial meeting not later than 10 days after the day by which all of its members have been appointed. (2) Obtaining official data The Commission may secure directly from any department or agency of the United States information necessary to enable it to carry out its duties. Upon request of the Commission, the head of that department or agency shall furnish that information to the Commission. (3) Mails The Commission may use the United States mails in the same manner and under the same conditions as other departments and agencies of the United States. (4) Administrative support services Upon the request of the Commission, the Librarian of Congress shall provide to the Commission, on a reimbursable basis, the administrative support services necessary for the Commission to carry out its duties. (5) Staff of Federal agencies Upon the request of the Commission, the head of any Federal department or agency may detail any of the personnel of that department or agency to the Commission to assist it in carrying out its duties. Any personnel detailed to the Commission under this paragraph may receive travel expenses, including per diem in lieu of subsistence, in accordance with applicable provisions