Income of a trust shall not be considered taxable to the grantor under subsection (a) or any other provision of this chapter merely because such income in the discretion of another person, the trustee, or the grantor acting as trustee or co-trustee, may be applied or distributed for the support or maintenance of a beneficiary (other than the grantor’s spouse) whom the grantor is legally obligated to support or maintain, except to the extent that such income is so applied or distributed. In cases where the amounts so applied or distributed are paid out of corpus or out of other than income for the taxable year, such amounts shall be considered to be an amount paid or credited within the meaning of paragraph (2) of section 661(a) and shall be taxed to the grantor under section 662.
26 U.S. Code § 677. Income for benefit of grantor
Amendment by Pub. L. 99–514 applicable with respect to transfers in trust made after Mar. 1, 1986, except for transfers pursuant to a certain binding property settlement agreement, see section 1402(c) of Pub. L. 99–514, set out as a note under section 673 of this title.