The Buy America Program is found in Title 23, US Code, § 313 and 23 CFR 635.410. The Buy America Program:
Outlines requirements for the use of American-made steel, iron, and manufactured products in transportation projects funded with federal dollars.
Applies to iron, steel, and iron and steel products that are to be permanently incorporated into a Federal Highway Administration project.
Also applies to Federal Transit Administration, Federal Railroad Administration, Federal Aviation Administration, and AMTRAK projects with varying standards for each project type.