Buy American Act (1933), codified at 41 U.S.C. §10a–10d.
The Act was passed by the U.S. Congress in 1933. The purpose of the Act is to provide preferential treatment for domestic sources of unmanufactured articles, manufactured goods, and construction material for public use unless a specific exemption applies.
The Act requires the federal government to purchase domestic supplies for use in the United States, if— (a) The supply contract exceeds the micro-purchase threshold; or (b) The supply portion of a contract for services that involves the furnishing of supplies exceeds the micro-purchase threshold. In determining what are domestic goods, the place of mining, production, or manufacture is controlling.
The Act has separate provisions for supply contracts and construction contracts and applies to small business set-asides.