(b) In order to carry out the provisions of this chapter, the head of the designated department or agency is authorized
(1) to appoint and fix the compensation of such persons as he deems necessary without regard to the civil service laws and chapter
51 and subchapter III of chapter
53 of title
5; except that no person so appointed shall receive compensation at a rate in excess of that received by persons under chapter
51 and subchapter III of chapter
53 of title
5 for the performance of comparable duties;
(2) to procure temporary and intermittent services in accordance with the provisions of section
3109 of title
5;
(3) to enter into contracts;
(4) to select, purchase, rent, construct, or otherwise acquire exhibits, including materials and equipment therefor, and to provide for the transportation, insurance, display, maintenance, and dismantling thereof;
(5) to incur such other expenses as may be necessary; and
(6) to accept
donations of money, property, and services and the loan of property.