Retaliation prohibited

No Executive agency may take or fail to take, or threaten to take or fail to take, an adverse personnel action with respect to any Federal employee or applicant for employment because— (1) a Federal employee declines a detail, transfer, assignment, or other temporary or permanent change to the official duty station of the Federal employee under section 2(a); (2) of the waiver of a requirement for an appointment or promotion under section 2(b); (3) a Federal employee requests or receives a travel or transportation allowance under section 5; or (4) a Federal employee uses leave to which the Federal employee is entitled under section 6.