29 C.F.R. § 502.1
(a) Statutory standard. Section 218(a) of the INA provides that:
(1) A petition to import an alien as an H-2A worker (as defined in the INA) may not be approved by the Secretary of the Department of Homeland Security (DHS) unless the petitioner has applied to the Secretary of the United States Department of Labor (Secretary) for a certification that:
(c) Role of the Employment Standards Administration (ESA), Wage and Hour Division (WHD).