Terminates from employment any federal employee who: (1) refuses to answer questions in a congressional hearing after being granted immunity; (2) in a congressional hearing, refuses to answer questions specifically, directly, and narrowly relating to his or her official duties, without being required to waive immunity with respect to the use of answers or the fruits thereof in a criminal prosecution; or (3) is found, by three-fourths of the congressional body to which testimony is given, to have willfully or knowingly given false testimony in a congressional hearing.