The following are the members of the Service:
    (1) Chiefs of mission, appointed under section 3942(a)(1) of
  this title or assigned under section 3982(c) of this title.
    (2) Ambassadors at large, appointed under section 3942(a)(1) of
  this title.
    (3) Members of the Senior Foreign Service, appointed under
  section 3942(a)(1) or 3943 of this title, who are the corps of
  leaders and experts for the management of the Service and the
  performance of its functions.
    (4) Foreign Service officers, appointed under section
  3942(a)(1) of this title, who have general responsibility for
  carrying out the functions of the Service.
    (5) Foreign Service personnel, United States citizens appointed
  under section 3943 of this title, who provide skills and services
  required for effective performance by the Service.
    (6) Foreign national employees, foreign nationals appointed
  under section 3943 of this title, who provide clerical,
  administrative, technical, fiscal, and other support at Foreign
  Service posts abroad.
    (7) Consular agents, appointed under section 3943 of this title
  by the Secretary of State, who provide consular and related
  services as authorized by the Secretary of State at specified
  locations abroad where no Foreign Service posts are situated.