Appointment; Compensation; Travel expenses— The Chair of the Commission, in consultation with Vice Chair of the Commission, and in accordance with rules agreed upon by the Commission, may appoint and fix the compensation of an executive director and other additional technical and administrative personnel as may be necessary to enable the Commission to carry out its duties, without regard to the provisions of title 5, United States Code, governing appointments in the competitive service, and without regard to the provisions of chapter 51 and subchapter III of chapter 53 of such title relating to classification and General Schedule pay rates, except that no rate of pay fixed under this clause may exceed the equivalent of that payable for a position at level V of the Executive Schedule under
section 5316 of title 5, United States Code. Travel expenses of the executive director and other additional technical and administrative personnel of the Commission shall be allowed at rates authorized for employees of agencies under subchapter I of chapter 57 of title 5, United States Code, except that foreign travel for official purposes by such director and personnel of the Commission is not authorized.