Testimony
A former employee may give testimony under oath or make statements required to be made under penalty of perjury. See 5 C.F.R. 2641.301(f).
Unless expert opinion testimony is given pursuant to court order, or he is called as a witness by the United States, a former employee may not provide such testimony on a matter on behalf of any other person except the United States or Congress if he is subject to the lifetime prohibition contained in 18 USC §207(a)(1).
