(b)
Certain married individuals living apart
For purposes of those provisions of this title which refer to this subsection, if—
(1)
an individual who is married (within the meaning of subsection (a)) and who files a separate return maintains as his home a household which constitutes for more than one-half of the taxable year the principal place of abode of a child (within the meaning of section
152
(f)(1)) with respect to whom such individual is entitled to a deduction for the taxable year under section
151 (or would be so entitled but for section
152
(e)),
(2)
such individual furnishes over one-half of the cost of maintaining such household during the taxable year, and
(3)
during the last 6 months of the taxable year, such individual’s spouse is not a member of such household,
such individual shall not be considered as married.