; ; (ii) in clause (ii), by striking the period at the end and inserting ; and ; and (iii) by adding at the end the following: (iii) the amount under clause (i)(I)(bb) shall be increased, for the third fiscal year beginning after the date of the enactment of this clause and for every third fiscal year thereafter, by the percentage (if any) by which the Consumer Price Index for the month of June preceding the date on which such increase takes effect exceeds the Consumer Price Index for the same month of the third preceding calendar year. . 105. Strengthening the prevailing wage system Section 212(p) of the Immigration and Nationality Act ( 8 U.S.C. 1182(p) ) is amended— (1) in paragraph (4), by adding at the end the following: With regard to the prevailing wage required to be paid under subsections (a)(5)(A), (n)(1)(A)(i)(II), and (t)(1)(A)(i)(II) (as added by section 402(b)(2) of Public Law 108–77 ), the first level of wages shall be not less than the mean of the lowest 50 percent of the wages surveyed. ; and (2) by adding at the end the following: (5) An employer may use an independent survey approved by the Secretary of Labor for purposes of this section. The Secretary shall approve such a survey if— (A) the survey was published during the most recent 2-year period; (B) the survey has not been duplicated since its initial publication; (C) the data upon which the survey is based was collected during the 2-year period ending on the date on which the survey was published; (D) the survey reflects the area of intended employment; (E) the employer’s job description adequately matches the job description in the survey; (F) the survey is across industries that employ workers in the occupation; (G) the wage determination is based on the arithmetic mean (weighted average)