rules To apply Rules similar to the rules of subsections (i)(1) and (k) of section 51 shall apply for purposes of this section. . (b) Credit made part of general business credit Subsection (b) of section 38 of such Code is amended by striking plus at the end of paragraph (35), by striking the period at the end of paragraph (36) and inserting , plus , and by adding at the end the following new paragraph: (37) the apprenticeship credit determined under section 45S(a). . (c) Denial of double benefit Subsection (a) of section 280C of such Code is amended by inserting 45S(a), after 45P(a), . (d) 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. 45S. Employees participating in qualified apprenticeship programs. . (e) Effective date The amendments made by this section shall apply to individuals commencing apprenticeship programs after the date of the enactment of this Act.