Melanie Aitken stepped down as Commissioner of Competition on September 21, 2012, a post she held since 2009. The Competition Bureau's enforcement measures made headlines under her tenure, including widely publicized cases such as those against Chatr and Rogers Communications and, more recently, against Bell Canada, Rogers Communications, Telus Corporation, and the Canadian Wireless Telecommunications Association (CWTA) (see Competition Bureau sues 3 of Canada's largest telecommunications companies for $31 million for misleading advertising promoting premium texting services for more details).

John Pecman has stepped in as Interim Commissioner of Competition.

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