production activity expenditures taken into account in determining the amount of the credit under subsection (a) shall not be taken into account in determining a credit under any other provision of this chapter. (3) Limitation on wages taken into account The amount of wages taken into account under subsection (a) with respect to any employee shall not exceed an amount equal to the contribution and benefit base in effect under section 230 of the Social Security Act for the calendar year in which the taxable year begins. . (b) Credit allowed against alternative minimum tax Section 38(c)(4)(B) of such Code is amended by redesignating clauses (x), (xi), and (xii) as clauses (xi), (xii), and (xiii), respectively and by inserting after clause (ix) the following new clause: (x) the credit determined under section 45U, . (c) Special rule for controlled foreign corporations Section 960(d) of such Code is amended by adding at the end the following new paragraph: (4) Special for controlled foreign corporations with distressed zone pharmaceutical and medical device expenditures The amount of foreign taxes deemed paid by a domestic corporation under paragraph (1) (determined without regard to this paragraph) shall be increased by an amount equal to the lesser of— (A) the excess of— (i) the amount calculated with respect to such corporation under paragraph (1) (determined without regard to this paragraph and by substituting 100 percent for 80 percent ), over (ii) the amount calculated with respect to such corporation under paragraph (1) (determined without regard to this paragraph), or (B) an amount equal to 15 percent of the qualified production activity expenditures (as defined in section 45U(b)(1)) of the controlled foreign corporation for the taxable year of the foreign corporation ending in or with the taxable year of the domestic corporation. . (d) Denial of deduction Section 280C of such Code is amended by adding at the end the following new subsection: (i) Distressed zone pharmaceutical and medical device production