The Administrator or his designated representatives may investigate and gather data regarding the wages, hours, and other conditions and practices of employment in any industry subject to this chapter, and may enter and inspect such places and such records (and make such transcriptions thereof), question such employees, and investigate such facts, conditions, practices, or matters as he may deem necessary or appropriate to determine whether any person has violated any provision of this chapter, or which may aid in the enforcement of the provisions of this chapter. Except as provided in section
of this title and in subsection (b) of this section, the Administrator shall utilize the bureaus and divisions of the Department of Labor for all the investigations and inspections necessary under this section. Except as provided in section
of this title, the Administrator shall bring all actions under section
of this title to restrain violations of this chapter.