; (II) such alien will be principally controlled and supervised by the petitioning employer; and (III) the placement of the nonimmigrant is not essentially an arrangement to provide labor for hire for an unaffiliated employer with which the nonimmigrant will be placed, rather than a placement in connection with the provision of a product or service for which specialized knowledge specific to the petitioning employer is necessary. (iii) The Secretary shall grant or deny a waiver under clause (ii) not later than seven days after the date on which the Secretary receives the application for the waiver. . (b) Prohibition on replacement of United States workers Section 214(c)(2) of the Immigration and Nationality Act ( 8 U.S.C. 1184(c)(2) ) is amended by adding at the end the following: (G) (i) An employer importing an alien as a nonimmigrant under section 101(a)(15)(L)— (I) may not at any time replace a United States worker (as defined in section 212(n)(4)(E)) with one or more such nonimmigrants