I am not an expert on the Canadian Broadcasting Corporation Act or on matters pertaining to the rights of journalists. However, it seems to me that, under the wording of the amendment introducing the new subsection 18.2(1) of the act, the CBC would be able to state that such disclosure could reasonably be expected to prejudice the corporation's journalistic independence. I think that a request for information on a program that has not yet been produced could fall into that category. However, I am not an expert on these matters.
On June 5th, 2013. See this statement in context.