For the past 84 years, an exemption in U.S. law allowed the import of goods produced by slaves and others forced into labor, including children, as long as demand exceeded supply. In two weeks, that will be illegal.
President Barack Obama signed a trade bill Wednesday that includes a provision closing a loophole in a law that went into effect in 1932.
That measure, the Tariff Act of 1930, did prohibit slave labor imports, but said the ban did not apply to any goods that were not otherwise produced in large enough quantities to "meet the consumptive demands of the United States."
The new bill was introduced last year as rights groups called attention to abusive labor practices, particularly in the fishing industry in Southeast Asia.
The U.N.'s International Labor Organization estimates 21 million people are victims of forced labor worldwide, more than half of them in the Asia-Pacific region. That labor brings companies more than $150 billion in illegal profits, according to the U.N.