If, under section 2513, one-half of a gift is treated as made by an individual and one-half of such gift is treated as made by the spouse of such individual, such gift shall be so treated for purposes of this chapter.
For purposes of paragraph (1), an interest which is used primarily to postpone or avoid any tax imposed by this chapter shall be disregarded.
For purposes of this chapter, the term “executor” has the meaning given such term by section 2203.