Actually it goes beyond that, because the first part of proposed section 12 deals with any land in the national capital region, and that intends to cover any federal projects that will be on lands in the region. So it's already clear in the rest of proposed section 12 that all projects go through the National Capital Commission when a department, for instance, wants to change a building. For approval they go to the NCC. Proposed paragraph 12(1)(a) deals with other lands that are not federal property, but the NCC would still have a right of approval and the design and the land use would be for federal use.
On November 4th, 2010. See this statement in context.