For purposes of this part, Section 56 of the Internal Revenue Code is modified as follows:

(a) (1) Section 56(a)(2) of the Internal Revenue Code, relating to mining exploration and development costs, shall apply only to expenses incurred during taxable years beginning on or after January 1, 1988.

(2) Section 56(a)(5) of the Internal Revenue Code, relating to pollution control facilities, shall apply only to amounts allowable as a deduction under Section 24372.3.

(3) (A) Section 56(a)(6) of the Internal Revenue Code, as in effect on January 1, 1997, relating to installment sales of certain property, shall not apply to payments received in taxable years beginning on or after January 1, 1997, with respect to dispositions occurring in taxable years beginning after December 31, 1987.

(B) This paragraph shall not apply to any taxable year beginning on or after January 1, 1998.

(b) For purposes of applying Section 56(d) of the Internal Revenue Code, all references to “December 31, 1986,” are modified to read “December 31, 1987,” and all references to “January 1, 1987,” are modified to read “January 1, 1988.”

(c) Section 56(d)(1) of the Internal Revenue Code is modified to include the provisions of Section 25108.

(d) For each taxable year beginning on or after January 1, 1988, and before January 1, 1990, Section 56(f)(2)(E) of the Internal Revenue Code, as it read during that period, is modified to refer to both of the following:

(1) Cooperatives under Section 24404 in lieu of the deduction allowed under Section 1382(b) of the Internal Revenue Code.

(2) Credit unions under Section 24405 as though the deduction allowed under Section 1382(b) of the Internal Revenue Code applied to credit unions.

(e) Section 56(g) of the Internal Revenue Code, relating to adjustments based on adjusted current earnings, is modified to provide that for corporations whose income is determined under Chapter 17 (commencing with Section 25101), adjusted current earnings shall be allocated and apportioned in the same manner as net income is allocated and apportioned for purposes of the regular tax. In addition, each of the following shall apply:

(1) Sections 56(g)(1)(A) and 56(g)(3) of the Internal Revenue Code are modified to provide that the term “adjusted current earnings” means the sum of the adjusted current earnings of that corporation apportionable to this state and the adjusted current earnings allocable to this state.

(2) Section 56(g)(1)(B) of the Internal Revenue Code is modified to provide that the term “alternative minimum taxable income” means the sum of the alternative minimum taxable income of that corporation apportionable to this state and the alternative minimum taxable income allocable to this state.

(f) Section 56(g)(4)(A) of the Internal Revenue Code is modified to provide the following:

(1) In the case of any property placed in service on or after January 1, 1981, and prior to January 1, 1987, other than residential rental property for which an election was made under former Section 24349.5, the amount allowable as depreciation or amortization with respect to that property shall be the same amount that would have been allowable for the taxable year had the taxpayer depreciated the property under the straight line method for each taxable year of the useful life (determined without regard to Section 24354.2) for which the taxpayer has held the property.

(2) In the case of any property placed in service on or after January 1, 1987, and prior to January 1, 1990, other than residential rental property for which an election was made under former Section 24349.5, the amount allowable as depreciation or amortization with respect to that property shall be determined by each of the following:

(A) Taking into account the adjusted basis of that property (as determined for purposes of computing alternative minimum taxable income) as of the close of the last taxable year beginning before January 1, 1990.

(B) Using the straight line method over the remainder of the recovery period applicable to that property under the alternative system of Section 168(g) of the Internal Revenue Code.

(3) The amendments made to paragraph (2) by the act adding this paragraph shall apply to taxable years beginning on or after January 1, 1990.

(4) The last sentence of Section 56(g)(4)(A)(i) of the Internal Revenue Code, shall not apply to taxable years beginning before January 1, 1998.

(g) (1) Section 56(g)(4)(C) of the Internal Revenue Code, relating to disallowance of items not deductible in computing earnings and profits, shall be modified as follows:

(A) (i) A deduction shall be allowed for amounts allowable as a deduction for purposes of the regular tax under Sections 24402, 24410, 24411, and 25106.

(ii) For each taxable year beginning on or after January 1, 1990, a deduction shall be allowed for amounts allowable as a deduction to a credit union for purposes of the regular tax under Section 24405.

(B) Section 56(g)(4)(C)(ii) of the Internal Revenue Code, relating to special rule for certain dividends, shall not be applicable.

(C) Section 56(g)(4)(C)(iii) of the Internal Revenue Code, relating to treatment of taxes on dividends from 936 corporations, shall not be applicable.

(D) Section 56(g)(4)(C)(iv) of the Internal Revenue Code, relating to special rule for certain dividends received by certain cooperatives, shall not be applicable.

(2) Section 56(g)(4)(D)(ii) of the Internal Revenue Code is modified to specify that Sections 24364 and 24407 shall not apply to expenditures paid or incurred in taxable years beginning on or after January 1, 1990.

(3) With respect to corporations that are not subject to the tax imposed under Chapter 2 (commencing with Section 23101), the amount of interest income included in the adjusted current earnings shall not exceed the amount of interest income included for purposes of the regular tax.

(4) Appropriate adjustments shall be made to limit deductions from adjusted current earnings for interest expense in accordance with the provisions of Sections 24344 and 24425.

(h) The provisions of Section 56(d)(3), relating to net operating loss attributable to federally declared disasters, shall not apply.

(Amended by Stats. 2010, Ch. 14, Sec. 58. (SB 401) Effective January 1, 2011.)