without regard to paragraphs (2) and (4) of section 1504(b). (C) Allocation of credit Except as provided in regulations, the credit under subsection (a) shall be allocated among the members of the expanded affiliated group in proportion to each member’s respective amount (if any) of qualified medical and drug manufacturing income. (4) Trade or business requirement This section shall be applied by only taking into account items which are attributable to the actual conduct of a trade or business. (5) Coordination with minimum tax For purposes of determining alternative minimum taxable income under section 55, qualified medical and drug manufacturing income shall be determined without regard to any adjustments under sections 56 through 59. (6) Unrelated business taxable income For purposes of determining the tax imposed by section 511, subsection (a)(1)(B) shall be applied by substituting unrelated business taxable income for taxable income . (7) 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 credit under this section with respect to any activity described in subsection (c)(4)(A). . (b) Treatment under base erosion tax Section 59A(b)(1)(B)(ii) of such Code is amended by striking plus at the end of subclause (I), by redesignating subclause (II) as subclause (III), and by inserting after subclause (I) the following new subclause: (II) the credit allowed under section 38 for the taxable year which is properly allocable to the domestic medical and drug manufacturing credit determined under section 45U(a), plus . (c) Part of general business credit Section 38(b) of such Code is amended by striking plus at the end of paragraph (32), by striking the period at the end of paragraph (33) and inserting , plus , and by adding at the end the following new paragraph: (34) the domestic medical and drug manufacturing credit determined under section 45U(a). . (d) Credit allowed