It seems as though the CBC says that it provides detailed information about its spending, program strategies, and operations to the broadcast regulator, which is the CRTC. Currently, some of that information is made public by the commission, but journalistic programming and creative material is excluded. They go on to say that BillC-461 limits the ability of the head of CBC/Radio-Canada to withhold information. They are concerned that the CRTC would no longer be able to withhold confidential information provided by CBC.
They're saying that the provisions of withholding are vested with CBC's personnel and don't extend to the CRTC, so it's basically a way of circumventing the process. I say this because according to your amendment, the head of CBC would be responsible for withholding this information.