(a) As used in this chapter:

(1) “Taxpayer” means any organization which is exempt from taxation in accordance with any of the provisions of Section 501 of the Internal Revenue Code and which, notwithstanding the provisions of said Section 501, is subject to taxation under said code on unrelated business taxable income attributable to a trade or business carried on in this state.

(2) “Unrelated business taxable income” means income as defined and determined in accordance with Section 512 of the Internal Revenue Code and subsection (b) of this section.

(3) “Taxable year” means the calendar year upon the basis of which the taxpayer‘s unrelated business taxable income is computed, provided, if a fiscal year other than a calendar year has been established for purposes of the Internal Revenue Code, “taxable year” means such fiscal year.

(4) “Unrelated trade or business” means unrelated trade or business as defined in the Internal Revenue Code.

(5) “Internal Revenue Code” means the Internal Revenue Code of 1986, or any subsequent corresponding internal revenue code of the United States, as from time to time amended.

(6) “Commissioner” means the Commissioner of Revenue Services.

(7) “Organization” means an organization described in Section 511(a)(2)(A) of the Internal Revenue Code or a trust described in Section 511(b)(2) of the Internal Revenue Code.

(b) The unrelated business taxable income of a taxpayer subject to the tax imposed by § 12-242bb shall be such taxpayer’s federal unrelated business taxable income, as determined under the Internal Revenue Code for the taxable year, with the following modifications: (1) There shall be added to federal unrelated business taxable income the amount of any tax imposed and paid under § 12-242bb during such taxable year; (2) there shall be subtracted from federal unrelated business taxable income the amount of any refund or credit for overpayment of the tax imposed under § 12-242bb during such taxable year; and (3) there may be subtracted from federal unrelated business taxable income a net operating loss deduction, which shall be the same as the net operating loss deduction allowed under § 12-217, except that (A) any net operating loss included in determining such deduction shall be adjusted to reflect the addition and subtraction from unrelated business taxable income required by subdivisions (1) and (2) of this subsection, (B) such deduction shall not include any net operating loss sustained during any taxable year beginning prior to January 1, 1992, or during any taxable year in which the taxpayer was not subject to the tax imposed by § 12-242bb, and (C) such deduction shall not exceed the deduction for the taxable year allowable under paragraph (6) of subsection (b) of Section 512 of the Internal Revenue Code.

(c) Any terms used in this section and § 12-242bb have the same meaning as when used in a comparable context in the Internal Revenue Code unless a different meaning is clearly required.