As you know, currently there is a schedule and it has 162 lakes, rivers, and waterways. That's hardly all of the lakes, rivers, waterways, or oceans that are part of Canada. If someone wishes to undertake a project that will impact a waterway in terms of crossing it in some way, but it's a non-scheduled waterway, then they have the option to opt in, which would mean that they have the option of submitting themselves to the regulatory process that would normally exist for scheduled waterways. In other words, they may feel that just to be 100% on the safe side, they want to go through the regulatory process that we would apply in the case of a scheduled waterway. That's an option to opt in.
On October 4th, 2016. See this statement in context.