The President shall establish a Board of Examiners for the Foreign Service to develop, and supervise the administration of, examinations prescribed under section
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(b) of this title to be given to candidates for appointment in the Service. The Board shall consist of 15 members appointed by the President (no fewer than 5 of whom shall be appointed from among individuals who are not Government employees and who shall be qualified for service on the Board by virtue of their knowledge, experience, or training in the fields of testing or equal employment opportunity). The Board shall include representatives of agencies utilizing the Foreign Service personnel system and representatives of other agencies which have responsibility for employment testing. The Board shall be chaired by a member of the Board, designated by the President, who is a member of the Service.