Connecticut taxable income derived from or connected with sources within Connecticut of a nonresident trust or estate

of a nonresident trust or estate (a) The Connecticut taxable income derived from or connected with sources within this state of a nonresident trust or estate is (1) its share of the items of income, gain, loss and deduction derived from or connected with Connecticut sources, as determined under § 12-714(a)-1 or § 12-714(b)-1 of this Part, plus or minus (2) the sum of the items of income, gain, loss and deduction derived from or connected with Connecticut sources, as determined under § 12-713(a)-3 of this Part, which would be included in federal adjusted gross income if the trust or estate were an individual but which are excluded from federal distributable net income, plus (3) in the case of a trust, includible gain (as defined under section 644 of the Internal Revenue Code) derived from or connected with Connecticut sources. (b) The source of such items of income, gain, loss and deduction shall be determined as if the trust or estate were a nonresident individual. (See Part II.) (c) While this section pertains to Section 12-713(a) of the general statutes, for purposes of supplementary interpretation, as the phrase is used in Section 12-2 of the general statutes, the adoption of this section is authorized by Section 12-701(c) of the general statutes.