29 C.F.R. § 783.19
Under amendments to the Fair Labor Standards Act effective September 3, 1961, employees not covered by reason of their personal engagement in interstate commerce activites, as explained in § 783.18 , are nevertheless brought within the coverage of the Act if they are employed in an enterprise which is defined in section 3(s) of the Act as an enterprise engaged in commerce or in the production of goods for commerce, or by an establishment described in section 3(s)(3) of the Act (see § 783.11 ). Such employees, if not exempt from the minimum wage and overtime pay requirements under section 13(a)(14) or exempt from the overtime pay requirements under section 13(b)(6), will have to be paid in accordance with those monetary standards of the Act unless expressly exempt under some other provision. This would generally be true of employees employed in enterprises and by establishments engaged in a business concerned with transportation of goods or persons by vessels, where the enterprise has an annual gross sales volume of $1,000,000 or more. Enterprise coverage is more fully discussed in part 776 of this chapter, dealing with general coverage.
29 C.F.R. §783.19