(a) Allowance of deduction. — A resident estate or resident trust shall be allowed a deduction against the taxable income otherwise computed under Chapter 11 of this title for any taxable year for the amount of its federal taxable income, as modified by § 1106 of this title which is, under the terms of the governing instrument, set aside for future distribution to nonresident beneficiaries.
(b) Rules of application. — The following rules shall apply in determining whether or to what extent income is set aside for future distribution to nonresident individual beneficiaries:
(1) If all or part of the federal taxable income of the estate or trust, as modified by § 1106 of this title, is distributable in future taxable years (whether or not added in the meantime to estate or trust corpus for estate or trust accounting purposes), to or for the benefit of a named individual beneficiary or beneficiaries, or a class of individual beneficiaries, and if on the last day of the taxable year of the estate or trust, 1 or more of such named individual beneficiaries, or 1 or more members of the first-named class of individual beneficiaries, is living, then the portion of the federal taxable income of the estate or trust, as modified by § 1106 of this title, considered set aside for future distribution to nonresident beneficiaries shall be computed:
a. In the case of a named individual beneficiary or beneficiaries, by first determining the share or shares of each such beneficiary as if the estate or trust had terminated on the last day of the taxable year and then determining the portion of such income realized by the estate or trust during the taxable year while the beneficiary was a nonresident of this State; and
b. In the case of the first-named class of beneficiaries, by first determining who the members of the class would be and the share of each such member if the estate or trust had terminated on the last day of the taxable year and then determining the portion of such income of each such share realized by the estate or trust while such member was a nonresident of this State.
(2) If all or part of the federal taxable income of the estate or trust, as modified by § 1106 of this title, is distributable in future taxable years (whether or not added in the meantime to estate or trust corpus for estate or trust accounting purposes) to or for the benefit of a named individual beneficiary or a class of individual beneficiaries, and if on the last day of the taxable year of the estate or trust no named individual beneficiary or none of the members of the first-named class of individual beneficiaries is then living, then the portion of the federal taxable income of the estate or trust, as modified by § 1106 of this title, considered as set aside for future distribution to nonresident beneficiaries, shall be determined in the manner provided in paragraph (b)(1) section, except that it will be presumed:
a. In the case of a named individual beneficiary or beneficiaries, that each such beneficiary was living and residing in the state where the putative parents resided during the taxable year; and
b. In the case of the first-named class of beneficiaries, that members of the class were living and residing with the person the relationship to whom determines or defines the membership in the class.
(3) For purposes of determining under paragraphs (b)(1) and (2) of this section the share of each beneficiary of an estate or trust in the federal taxable income, as modified by § 1106 of this title, the discretion in any person over the distribution of such income (whether or not acting in a fiduciary capacity and whether or not subject to a standard) shall be presumed not to have been exercised unless such discretion was irrevocably exercised as of the last day of the taxable year and all of the federal taxable income of an electing small business trust described in § 1635(b) of this title, attributable to the trust's ownership of S corporation stock, shall be treated as having been set aside for distribution in future taxable years.
(4) For purposes of determining under paragraphs (b)(1) and (2) of this section when federal taxable income, as modified by § 1106 of this title, was realized, the following rules shall apply:
a. Interest income shall be considered realized when payable;
b. Dividend income shall be considered realized on the day the dividend is payable;
c. Gains and losses from the sale or exchange of property shall be considered realized or deductible, as the case may be, on the settlement date of the sale or the effective date of the exchange; and
d. Commissions on income or principal shall be deemed deductible on the date charged.
(5) The Director is authorized to establish more detailed rules to apply paragraphs (b)(1) through (4) of this section in any manner not inconsistent with the provisions of such paragraphs.