29 U.S.C. § 211

(a) Investigations and inspections 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 212 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 212 of this title , the Administrator shall bring all actions under section 217 of this title to restrain violations of this chapter. (b) State and local agencies and employees With the consent and cooperation of State agencies charged with the administration of State labor laws, the Administrator and the Secretary of Labor may, for the purpose of carrying out their respective functions and duties under this chapter, utilize the services of State and local agencies and their employees and, notwithstanding any other provision of law, may reimburse such State and local agencies and their employees for services rendered for such purposes. (c) Records Every employer subject to any provision of this chapter or of any order issued under this chapter shall make, keep, and preserve such records of the persons employed by him and of the wages, hours, and other conditions and practices of employment maintained by him, and shall preserve such records for such periods of time, and shall make such reports therefrom to the Administrator as he shall prescribe by regulation or order as necessary or appropriate for the enforcement of the provisions of this chapter or the regulations or orders there­under. The employer of an employee who performs substitute work described in section 207(p)(3) of this title may not be required under this subsection to keep a record of the hours of the substitute work. (d) Homework regulations The Administrator is authorized to make such regulations and orders regulating, restricting, or prohibiting industrial homework as are necessary or appropriate to prevent the circumvention or evasion of and to safeguard the minimum wage rate prescribed in this chapter, and all existing regulations or orders of the Administrator relating to industrial homework are continued in full force and effect.