; (B) increased from such amount by the annual percentage increase in the Consumer Price Index Research Series Using Current Methods, or its successor publication, as determined by the Bureau of Labor Statistics; and (C) rounded to the nearest multiple of $0.05. (2) In calculating the annual percentage increase in the Consumer Price Index Research Series Using Current Methods for the purposes of paragraph (1)(B), the Secretary shall compare such Consumer Price Index Research Series Using Current Methods for the most recent month, quarter, or year available (as selected by the Secretary prior to the first year for which a minimum wage is in effect pursuant to this subsection) with the Consumer Price Index Research Series Using Current Methods for the same month in the last year in which the minimum wage rate under subsection (a)(1) was updated, the same quarter in such year, or such year, respectively. (i) (1) Notwithstanding subsection (a)(1), the wage rate in effect under subsection (a) for a State or locality shall be the regional minimum wage rate set by the Secretary for such State or locality under paragraph (2) with respect to such State or locality if— (A) such State or locality opts for such regional minimum wage rate and notifies the Secretary; and (B) such regional minimum wage rate is not less than the wage rate in effect under subsection (a)(1). (2) (A) Not later than 1 year before a new minimum wage rate determined under subsection (a)(1)(B) is to take effect, the Secretary shall determine the regional minimum wage rate for each State and locality under this subsection. (B) With respect to a State, the regional minimum wage rate shall be equal to— (i) the amount to take effect under subsection (a)(1)(B); (ii) adjusted by the percentage difference between the most recent regional price parity with respect to such State and the national price level, published by the Bureau of Economic Analysis of the Department of Commerce