Any allocation by an individual of his GST exemption under section 2631(a) may be made at any time on or before the date prescribed for filing the estate tax return for such individual’s estate (determined with regard to extensions), regardless of whether such a return is required to be filed.
If any individual makes a direct skip during his lifetime, any unused portion of such individual’s GST exemption shall be allocated to the property transferred to the extent necessary to make the inclusion ratio for such property zero. If the amount of the direct skip exceeds such unused portion, the entire unused portion shall be allocated to the property transferred.
If any individual makes an indirect skip during such individual’s lifetime, any unused portion of such individual’s GST exemption shall be allocated to the property transferred to the extent necessary to make the inclusion ratio for such property zero. If the amount of the indirect skip exceeds such unused portion, the entire unused portion shall be allocated to the property transferred.
For purposes of this subsection, the term “indirect skip” means any transfer of property (other than a direct skip) subject to the tax imposed by chapter 12 made to a GST trust.
For purposes of this subsection, an indirect skip to which section 2642(f) applies shall be deemed to have been made only at the close of the estate tax inclusion period. The fair market value of such transfer shall be the fair market value of the trust property at the close of the estate tax inclusion period.
An election under subparagraph (A)(i)(I) shall be deemed to be timely if filed on a timely filed gift tax return for the calendar year in which the transfer was made or deemed to have been made pursuant to paragraph (4) or on such later date or dates as may be prescribed by the Secretary.
The allocation under paragraph (1) shall be made among the properties described in subparagraph (A) thereof and the trusts described in subparagraph (B) thereof, as the case may be, in proportion to the respective amounts (at the time of allocation) of the nonexempt portions of such properties or trusts.
For purposes of subparagraph (A), the term “nonexempt portion” means the value (at the time of allocation) of the property or trust, multiplied by the inclusion ratio with respect to such property or trust.