this section, hold hearings, sit and act at times and places, take testimony, and receive evidence as the Commission considers appropriate. (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 this section. Upon the request of the Chairperson, the head of that department or agency shall furnish that information to the Commission. (3) Gifts, bequests, and devises To the extent or in the amounts provided in advance in appropriations Acts, the Commission may accept, use, and dispose of gifts, bequests, or devises of services or property, both real and personal, for the purposes of aiding or facilitating the work of the Commission. Gifts, bequests, or devises of money and proceeds from sales or other property received as gifts, bequests, or devises shall be deposited in the Treasury and shall be available for disbursement upon order of the Chairperson. (4) Mails The Commission may use the United States mails in the same manner and under the same conditions as departments and agencies of the United States. (5) Administrative support services (A) General services administration Upon the request of the Commission, the Administrator of General Services shall provide to the Commission, on a reimbursable basis, the administrative support services necessary for the Commission to carry out its responsibilities under this section. (B) Other departments and agencies In addition to the assistance prescribed in subparagraph (A), the head of a department or agency of the United States may provide to the Commission, on a reimbursable basis, such services, funds, facilities, staff, or other support services as such head may determine advisable and as may be authorized by law. (6) Contract authority To the extent or in the amounts provided in advance in appropriations Acts, the Commission may contract with and compensate government and private agencies or persons for any purpose necessary to enable it to carry out this