Just a quick clarification.
The problem we have in Quebec is different. Under the act, when an agency hasn't responded within the prescribed time frame, the assumption is that the organization is refusing to disclose. So the citizen immediately turns to us, and we treat the file as a refusal to grant access. Further to that process, the body must give reasons for the refusal.
What that means in Quebec, then, is that it's not necessary to negotiate time extensions with public bodies.