from (or available for distribution from) the project. The Secretary shall prescribe such regulations as may be necessary or appropriate to carry out this paragraph, including regulations to prevent the manipulation of the amount determined under the preceding sentence. (G) Adjusted investor equity (i) In general For purposes of subparagraph (F), the term adjusted investor equity means, with respect to any calendar year, the aggregate amount of cash taxpayers invested with respect to the project increased by the amount equal to— (I) such amount, multiplied by (II) the cost-of-living adjustment for such calendar year, determined under section 1(f)(3) by substituting the base calendar year for calendar year 1987 . An amount shall be taken into account as an investment in the project only to the extent there was an obligation to invest such amount as of the beginning of the credit period and to the extent such amount is reflected in the adjusted basis of the project. (ii) Cost-of-living increases in excess of 5 percent not taken into account Under regulations prescribed by the Secretary, if the CPI for any calendar year (as defined in section 1(f)(4)) exceeds the CPI for the preceding calendar year by more than 5 percent, the CPI for the base calendar year shall be increased such that such excess shall never be taken into account under clause (i). (iii) Base calendar year For purposes of this subparagraph, the term base calendar year means the calendar year with or within which the 1st taxable year of the credit period ends. (H) Middle-income portion For purposes of this paragraph, the middle-income portion of a building is the portion of such building equal to the applicable fraction specified in the extended middle-income housing commitment for the building. (I) Period for finding buyer The period referred to in this subparagraph is the 1-year period beginning on the date (after the 14th year of the credit period) the taxpayer submits a written request to the housing credit agency to find a person to acquire the