1990—Subsec. (a). Pub. L. 101–454 substituted “abroad” for “in the Soviet Union or Eastern Europe”.

1987—Subsec. (b). Pub. L. 100–204 amended subsec. (b) generally. Prior to amendment, subsec. (b) read as follows: “Such service shall be in accordance with the relevant authorities of the Foreign Service Act of 1980, the State Department Basic Authorities Act of 1956, and title 5.”