If you plan to pursue EAc2.1: Existing Building Commissioning—Investigation and Analysis, you have the option of meeting those credit requirements with completion of an ASHRAE Level II: Energy Audit. EAc2.1 can also be earned by starting a commissioning process, but this is unrelated to EAp1 requirements. If you do choose the auditing option for EAc2.1, coordinate your efforts now, and complete the requirements for both the Level I and Level II audits at the same time.