Federal Ethics Commissioner Mario Dion’s office says it is not planning to investigate the appointment of former ambassador to China Dominic Barton as the incoming chair of mining giant Rio Tinto, after two NDP MPs had asked the commissioner to look into the matter. “I can confirm Commissioner Dion is not launching an examination into Dominic Barton as he did not have direct and significant dealings with Rio Tinto while he was Canada’s Ambassador in China,” Melanie Rushworth, the communications director at the Office of the Conflict of Interest and Ethics Commissioner (OCIEC), said in a statement to The Epoch Times.  Barton met with Rio Tinto officials in October 2021 when he was still Canada’s ambassador to China. He subsequently announced his resignation from that post early the following December and Rio Tinto appointed him as the future chair of their board shortly afterward.  Rushworth said that Barton communicated with them in …