section 41 for such taxable year. (2) Expenses included in determining base period research expenses Any qualified clinical testing expenses for any taxable year which are qualified research expenses (within the meaning of section 41(b)) shall be taken into account in determining base period research expenses for purposes of applying section 41 to subsequent taxable years. (d) Special rules (1) Certain rules made applicable Rules similar to the rules of paragraphs (1) and (2) of section 41(f) shall apply for purposes of this section. (2) Election This section shall apply to any taxpayer for any taxable year only if such taxpayer elects (at such time and in such manner as the Secretary may by regulations prescribe) to have this section apply for such taxable year. . (b) Credit made part of general business credit Subsection (b) of section 38 of the Internal Revenue Code of 1986 is amended by striking plus at the end of paragraph (31), by striking the period at the end of paragraph (32) and inserting , plus , and by adding at the end the following new paragraph: (33) the credit determined under section 45T. . (c) Clerical amendment The table of sections for subpart D of part IV of subchapter A of chapter 1 of such Code is amended by adding at the end the following new item: Sec. 45T. Clinical testing expenses for certain high-risk, high-reward drugs. . (d) Effective date The amendments made by this section shall apply to taxable years beginning after the date of the enactment of this Act.