42 USC 3546 - Use of domestic products

(a) Prohibition against fraudulent use of “Made in America” labels 
A person shall not intentionally affix a label bearing the inscription of Made in America, or any inscription with that meaning, to any product sold in or shipped to the United States, if that product is not a domestic product.
(b) Report 
The Secretary of Housing and Urban Development and the Secretary of Agriculture shall each submit, before January 1, 1994, a report to the Congress on procurements of products that are not domestic products.
(c) “Domestic product” defined 
For the purposes of this section, the term domestic product means a product
(1) that is manufactured or produced in the United States; and
(2) at least 50 percent of the cost of the articles, materials, or supplies of which are mined, produced, or manufactured in the United States.