be applied by substituting unrelated business taxable income for taxable income . (4) Regulations The Secretary shall prescribe such regulations as are necessary to carry out the purposes of this section, including regulations which prevent more than 1 taxpayer from being allowed a deduction under this section with respect to any activity described in subsection (c)(4)(A). . (2) Conforming amendments (A) (i) Section 74(d)(2)(B) of the Internal Revenue Code of 1986 is amended by inserting 251, after 221, . (ii) Section 246(b)(1) of such Code is amended by inserting 251, after 243(a)(1), . (iii) Section 469(i)(3)(E)(iii) of such Code is amended by inserting 251, after 250, . (B) Section 170(b)(2)(D) of such Code is amended by striking the period at the end of clause (v) and inserting , and and by adding at the end the following new clause: (vi) section 251. . (C) Section 172(d) of such Code, as amended by this Act, is amended by adding at the end the following new paragraph: (11) The deduction under section 251 shall not be allowed. . (3) Clerical amendment The table of sections for part VIII of subchapter B of chapter 1 of such Code is amended by adding at the end the following new item: Sec. 251. Income attributable to domestic textile production activities. . (4) Effective date The amendments made by this subsection shall apply to taxable years beginning after the date of the enactment of this Act. (c) Deduction for reused and recycled textiles (1) In general Part VI of subchapter B of the Internal Revenue Code of 1986 is amended by adding at the end the following new section: 199B. Textile reuse and recycling activity income (a) In general There shall be allowed a deduction equal to 15 percent of the qualified textile reuse and recycling activity income of the taxpayer for the taxable year. (b) Qualified textile reuse and recycling activity income For purposes of this section— (1) In general The term qualified textile reuse and recycling activity income means the excess (if any) of— (A) the gross income of the