The following is from a 13 March 2012 news item from the World Trade Organization.
On 13 March 2012, the United States, the European Union and Japan requested consultations with China under the dispute settlement system concerning the latter’s restrictions on export of various forms of rare earths, tungsten and molybdenum.
This item is available in its entirety at:
http://www.wto.org/english/news_e/news12_e/dsrfc_13mar12_e.htm