special agent
(15) “special agent” means an employee of the Department of State with a primary skill code of 2501— (A) the duties of whose position— (i) are primarily— (I) the investigation, apprehension, or detention of individuals suspected or convicted of offenses against the criminal laws of the United States; or (II) the protection of persons pursuant to section 2709(a)(3) of this title against threats to personal safety; and (ii) are sufficiently rigorous that employment opportunities should be limited to young and physically vigorous individuals, as determined by the Secretary of State pursuant to section 4823 of this title ; (B) performing duties described in subparagraph (A) before, on, or after November 13, 1998 ; or (C) transferred directly to a position which is supervisory or administrative in nature after performing duties described in subparagraph (A) for at least 3 years.