According to LEED, a lavatory faucet must have a water use rate that is less than what standard?

The correct choice is based on the Environmental Protection Agency's Energy Policy Act of 1992 (EPAct of 1992), which establishes water efficiency standards for plumbing fixtures, including lavatory faucets. According to this act, lavatory faucets must have a maximum flow rate of 0.5 gallons per minute (gpm) at a pressure of 60 pounds per square inch.

This specific standard is critical for LEED certification efforts aimed at achieving water efficiency and conservation within buildings. By aligning with the EPAct of 1992, LEED encourages the implementation of fixtures that reduce water consumption, ultimately contributing to sustainability goals and minimizing environmental impact.

While other options refer to various regulations and standards, they do not specifically set the water use rate required for lavatory faucets in the context of LEED certification. Hence, the reliance on the EPAct of 1992 is the most relevant and accurate answer for this question.