Only citizens of the United States may be appointed to the Service, other than for service abroad as a consular agent or as a foreign national employee.
The fact that an applicant for appointment as a Foreign Service officer candidate is a veteran or disabled veteran shall be considered an affirmative factor in making such appointments. As used in this subsection, the term “veteran or disabled veteran” means an individual who is a preference eligible under subparagraph (A), (B), or (C) of section 2108(3) of title 5.