This strikes me as a very poorly thought-out "plan."
For example, living in a newer condo, I have to wonder how things will have changed energy-wise when/if I move in a few years? I'm surrounded on all sides by other units and have one wall with windows. I can't change those windows by myself, and they probably won't be changed for decades. So I, and every subsequent owner of this unit, get to pay for an audit that provides absolutely nothing at all useful to either the owner or prospective buyer.
It's a little idiotic.
It's also hard to see how reasonable comparisons will be made between buildings.
Honestly, if the government is so serious about energy consumption, why don't they change the building code to reflect that concern?