29 C.F.R. § 1620.5
Goods (as defined in section 3(i) of the FLSA) are "produced for commerce" if they are "produced, manufactured, mined, handled or in any other manner worked on" in any State for sale, trade, transportation, transmission, shipment, or delivery, to any place outside thereof. Goods are produced for commerce where the producer intends, hopes, expects, or has reason to believe that the goods or any unsegregated part of them will move (in the same or in an altered form or as a part of ingredient of other goods) in interstate or foreign commerce. If such movement of the goods in commerce can reasonably be anticipated by the producer when the goods are produced, it makes no difference whether the producer or the person to whom the goods are transferred puts the goods in interstate or foreign commerce. The fact that goods do move in interstate or foreign commerce is strong evidence that the producer intended, hoped, expected, or had reason to believe that they would so move. Goods may also be produced "for commerce" where they are to be used within the State and not transported in any form across State lines. This is true where the goods are used to serve the needs of the instrumentalities or facilities by which interstate or foreign commerce is carried on within the State. For examples, see 29 CFR 776.20 .
29 C.F.R. §1620.5