Simply put, because the processes that will remain, that may, for instance, stop a given project—say a bridge—whether or not they have approved or not approved of that given infrastructure project, will not have considered navigation. So there may be environmental assessment processes or approval processes that do consider matters other than navigation, and they may approve a project, not having considered navigation.
This is the critical point to understand with the proposed amendments. There are provisions for ministerial exemptions of works and waterways. Pursuant to these amendments, if the transport minister decides at his or her discretion, without any parliamentary oversight, without any prior consultation with other Canadians, that certain works—call it a small dam or a small culvert or certain waterways, a stream, five to ten metres wide—or waterways are to be exempted, there will be no approval process under the Navigable Waters Protection Act and there will be no environmental assessment process. That means navigation will not be considered.