[Ottawa] Canada has introduced legislation for a national do-not-call list, but the Canadian Marketing Association opposes parts of the proposed law. The CMA already maintains its own list of more than 340,000 phone numbers that its 800 corporate members must not call. However, the new rules would let the Canadian Radio-Television and Telecommunications Commission create the national list and give it other powers. "We're particularly concerned with the fact that any exemptions would be left to the CRTC," said John Gustavson, CMA president. "We feel it's necessary that companies be able to protect their current business by allowing them to contact their existing customers. For example, a publisher should be able to contact existing subscribers to tell them that their current subscription is about to run out. Market researchers should be exempt, as well."