Federal officials are preparing to enforce an 86-year-old ban on importing goods made by children or slaves under new provisions of a law signed by President Barack Obama. This law slams shut an unconscionable and archaic loophole that forced America to accept products made by children or slave labor," said Sen. Ron Wyden, an Oregon Democrat who worked on the legislation. The Tariff Act of 1930, which gave Customs and Border Protection the authority to seize shipments where forced labor was suspected and block further imports, was last used in 2000, and has been used only 39 times all together largely because of two words: "consumptive demand" - if there was not sufficient supply to meet domestic demand, imports were allowed regardless of how they were produced. The Trade Facilitation and Trade Enforcement Act signed by Obama on Wednesday eliminated that language, allowing stiffer enforcement. To start an investigation, Customs needs to receive a petition from anyone - a business, an agency, even a non-citizen - showing "reasonably but not conclusively" that imports were made at least in part with forced labor. A Labor Department list of more than 350 goods produced by child labor or forced labor provides a detailed breakdown that human rights groups plan to use as they petition the government to take action.