As said in my presentation, there is the LEED EBOM—that is, LEED for existing buildings—which I think covers what you're talking about. The LEED EBOM mandates that you be essentially in the top 30% of energy-performing buildings.
I think that's a very easy implementation step, mandating the LEED EBOM. Then the energy targets and numbers we are talking about are for existing buildings. I think that setting a target, mandating to the operators of those buildings that they need to make renovations to get to those numbers, would be effective.