; (B) by inserting and at the end of subparagraph (C); and (C) by inserting at the end the following: (D) not less than the amount determined by the Secretary under subsection (b), beginning September 1, 2015; ; and (2) by redesignating subsection (b) as subsection (c) and inserting after subsection (a) the following: (b) (1) Subject to paragraph (2), not later than June 1, 2017, and once every 4 years thereafter, the Secretary shall determine the minimum wage rate applicable under subsection (a)(1) based on the formula described in paragraph (3). The Secretary shall publish such wage rate in the Federal Register not later than October 1 of each year. (2) If the minimum wage rate determined by the Secretary under paragraph (1) would result in a lower minimum wage rate than the minimum wage rate in effect at the time of such determination, the Secretary shall not adjust, pursuant to this subsection, the minimum wage rate so in effect. (3) The minimum wage rate determined by the Secretary under paragraph (1) shall be the minimum hourly wage sufficient for a person working for such wage for 40 hours per week, 52 weeks per year, to earn an annual income in an amount that is 15 percent higher than the Federal poverty threshold for a family of 4, with two children under the age of 18, and living in any of the 48 contiguous States, as published by the Bureau of the Census for the year in which the wage rate is being so determined. .