p77 BD&C userguide 2009
CASE 2. Previously Developed Areas or Graded Sites
"Projects earning SS Credit 2: Development Density and Community
Connectivity may include vegetated roof surface in this calculation"

does this mean that if I don't earn any points under SSc2, then I can't count intensive (and consisting of native/adaptive species) green roof areas towards calculated area? Why is this? What does it have to do with SSc2?