There's no central air conditioning in the Centre Block. It doesn't meet code in most respects. Bringing it up to code takes space, and modernizing it as well.
Making it a modern building so that it will meet modern codes will require space. One of the potential opportunities—and this is the beginning of a conversation—is to leverage the courtyards so that some of that space.... Elevators, as you saw in the presentation, are one potential opportunity to leverage, so that you lose less space in the heritage interiors of the building. Those decisions will be fundamentally critical over time.