(a) Market-responsive staff wagesNot later than 180 days after December 16, 2016, and periodically thereafter, the Secretary shall establish and implement a prevailing wage rates goal for positions in the local compensation plan, as described in section 3968 of this title, at each diplomatic post that—
(b) Exception
The prevailing wage rate goal established under subsection (a) shall not apply if compliance with such subsection would be inconsistent with applicable United States law, the law in the locality of employment, or the public interest.