Prerequisite (required, no points); applies to all eight BD+C adaptations. Reduce aggregate fixture and fitting water use by 20% from the baseline (toilets 1.6 gpf, urinals 1.0 gpf, public lavatory faucets 0.5 gpm, private and kitchen faucets 2.2 gpm, showerheads 2.5 gpm), with WaterSense labelled toilets, urinals, private faucets and showerheads; install ENERGY STAR or equivalent clothes washers, dishwashers and ice machines, pre-rinse valves of 1.3 gpm or less, no once-through potable cooling, and metered, controlled cooling towers with low-drift eliminators; healthcare, retail, schools and hospitality also meet kitchen equipment and process limits.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.