Some oil and gas operations are exempt from reporting. Others.... I think Environment Canada would be in a better position to respond to that.
Fracking operations have been exempted because, generally, I think, the size of the operations are very small. There has to be some threshold above which reporting is required, and below that threshold it's not required. If your operation has, I think it's 10,000 person years of employment, there's a benchmark below which you don't have to report.