This document explains how to fulfill the benchmarking requirement and the audit requirement of the San Francisco's Existing Commercial Buildings Energy Performance Ordinance. The two requirements are distinct, with different minimum qualifications, timing, reporting method, and exemptions. Some buildings will be exempt from an energy audit due to excellent energy management, but benchmarking is required for all occupied nonresidential buildings of 10,000 square feet or larger that have been in operation for at least one year.