There is probably restrictions on News but they certainly are not forced to halt all news as you can see with Ivanhoe financing a while ago:
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April 25, 2006 Ivanhoe Mines Closes C$189 Million Bought-Deal Financing
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April 18, 2006 Ivanhoe Mines to begin drilling at Amethyst Castle Copper-Gold-Uranium Project, Mt. Isa District, Australia
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April 03, 2006 Ivanhoe Mines Receives Initial Annual Payment of US$28 Million from the Sale of the Savage River Iron Ore Mine
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March 31, 2006 Ivanhoe Mines Announces 2005 Year-End Financial Results
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March 29, 2006 Ivanhoe Mines Announces C$165 Million Bought-Deal Financing