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China has also challenged the US policy change at the World Trade Organization. In September 2009, the US Commerce Department slapped huge punitive duties on off-road tires from China.
In response, the Chinese government asked the WTO to open an investigation into the matter. The US blocked China's request for a tire probe, but were not able to block the second request under WTO rules.
China requested that the organization establish a panel to decide the legitimacy of the tariffs. The ruling in that case is expected to be made public in the coming months.