; (6) to conduct nongeneric research, development, and demonstration activities necessary or appropriate to carrying out the functions of the Administrator; and (7) to make such rules and regulations, not inconsistent with this Act, as may be necessary to carry out the functions of the Administrator. 502. Personnel (a) Officers and employees (1) Appointment In addition to the senior officers described in section 203, the Administrator may appoint and fix the compensation of such officers and employees as may be necessary to carry out the functions of the Administration. (2) Compensation Except as provided in paragraph (3), officers and employees appointed under this subsection shall be appointed in accordance with the civil service laws and the compensation of the officers and employees shall be fixed in accordance with title 5, United States Code. (3) Exception Notwithstanding paragraph (2), the Administrator may, to the extent the Administrator determines necessary to discharge the responsibilities of the Administrator— (A) appoint exceptionally well qualified individuals to scientific, engineering, or other critical positions without regard to the provisions of chapter 33 of title 5, United States Code, governing appointments in the competitive service