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107 STAT. 486 PUBLIC LAW 103-66—AUG. 10, 1993 (B) If any FSLIC assistance not credited before March 4, 1991, is with respect to a loss sustained or charge-off in a taxable year ending before March 4, 1991, for purposes of determining the amount of any net operat- ing loss carryover to a t^able year ending on or after March 4, 1991, the provisions of this section shall apply to such assistance for purposes of determining the amount of the net operating loss for the taxable year in which such loss was sustained or debt written off. Except as provided in the preceding sentence, this section shall not apply .to any FSLIC assistance with respect to a loss sustained or charge-off in a taxable year ending before March 4,1991. (2) EXCEPTIONS.—^The provisions of this section shall not apply to any assistance to which the amendments made by section 1401(aX3) of the Financial Institutions Reform, Recov- ery, and Enforcement Act of 1989 apply. SEC. 13225. MODIFICATION OF CORPORATE ESTIMATED TAX RULES. (a) INCREASE IN REQUIRED INSTALLMENT BASED ON CURRENT YEAR TAX 26 use 6655. (i) IN GENERAL.—Clause (i) of section 6655(d)(1)(B) (relat- ing to amount of required installment) is amended by striking "91 percent" each place it appears and inserting "100 percent". (2) CONFORMING AMENDMENTS.— (A) Subsection (d) of section 6655 is amended— (i) by striking paragraph (3), and (ii) by striking "91 PERCENT" in the paragraph heading of paragraph (2) and inserting "lOO PERCENT". (B) Clause (ii) of section 6655(e)(2XB) is amended by striking the table contained therein and inserting the fol- lowing: The "In the case of the following applicable required installments: percentage is: Ist 25 2nd 50 3rd 75 4th 100." (C) Clause (i) of section 6655(e)(3XA) is amended by striking "91 percent" and inserting "100 percent". (b) MODIFICATION OF PERIODS FOR APPLYING ANNUALIZATION.— (1) Clause (i) of section 6655(eX2XA) is amended— (A) by striking "or for the first 5 months" in subclause (II), (B) by striking "or for the first 8 months" in subclause (III), and (C) by striking "or for the first 11 months" in subclause (IV). (2) Paragraph (2) of section 6655(e) is amended by adding at the end thereof the following new subparagraph: "(C) ELECTION FOR DIFFERENT ANNUALIZATION PERI- ODS.— "(i) If the taxpayer makes an election under this clause— "(I) subclause (I) of subparagraph (A)(i) shall be applied by substituting '2 months* for '3 months',