For purposes of this subpart, a United States shareholder of a controlled foreign corporation may, under regulations prescribed by the Secretary, elect to make the determinations under subsection (a)(2) of this section and under subsection (g) of section
954 as of the close of the years following the years referred to in such subsections, or as of the close of such longer period of time as such regulations may permit, in lieu of on the last day of such years. Any election under this paragraph made with respect to any taxable year shall apply to such year and to all succeeding taxable years unless the Secretary consents to the revocation of such election.