Special rules in case of Federal service

With respect to service included as employment under section 410 of this title which is performed in the employ of the United States or in the employ of any instrumentality which is wholly owned by the United States, including service, performed as a member of a uniformed service, to which the provisions of subsection ( l )(1) of such section are applicable, and including service, performed as a volunteer or volunteer leader within the meaning of the Peace Corps Act [ 22 U.S.C. 2501 et seq.], to which the provisions of section 410( o ) of this title are applicable, the Commissioner of Social Security shall not make determinations as to the amounts of remuneration for such service, or the periods in which or for which such remuneration was paid, but shall accept the determinations with respect thereto of the head of the appropriate Federal agency or instrumentality, and of such agents as such head may designate, as evidenced by returns filed in accordance with the provisions of section 3122 of the Internal Revenue Code of 1954 and certifications made pursuant to this subsection. Such determinations shall be final and conclusive. Nothing in this paragraph shall be construed to affect the Commissioner’s authority to determine under sections 409 and 410 of this title whether any such service constitutes employment, the periods of such employment, and whether remuneration paid for any such service constitutes wages.

The head of any such agency or instrumentality is authorized and directed, upon written request of the Commissioner of Social Security, to make certification to the Commissioner with respect to any matter determinable for the Commissioner of Social Security by such head or his agents under this subsection, which the Commissioner of Social Security finds necessary in administering this subchapter.