5 U.S.C. § 4102: Exceptions; Presidential authority

a corporation supervised by the Farm Credit Administration if private interests elect or appoint a member of the board of directors; the Tennessee Valley Authority; or an individual (except a commissioned officer of the National Oceanic and Atmospheric Administration) who is a member of a uniformed service during a period in which he is entitled to pay under section 204 of title 37 . the Foreign Service of the United States; or an individual appointed by the President, unless the individual is specifically designated by the President for training under this chapter. except an agency or part thereof, or an employee or group or class of employees therein, from this chapter or a provision thereof (except this section); and withdraw an exception made under this subsection.