That's how it works now. The program is administered by the Department of the Environment and Climate Change. It's the minister who has responsibility, so she's responsible for designating on a gift-by-gift basis. If it's donated to a registered charity, such as the Nature Conservancy of Canada, she basically certifies that it meets the purposes and goals of the measure. The idea is to apply that same logic to municipalities and similar bodies.
On November 2nd, 2017. See this statement in context.