The Council is authorized to employ, and fix the compensation of, such specialists and other experts as may be necessary for the carrying out of its functions under this chapter, without regard to the civil-service laws, and is authorized, subject to the civil-service laws, to employ such other officers and employees as may be necessary for carrying out its functions under this chapter, and fix their compensation in accordance with chapter 51 and subchapter III of chapter 53 of title 5.