For EAc5.1, there are no specific requirements. In your M&V plan, you will identify the uses you will submeter or monitor in order to confirm your energy savings. If you are pursuing Option 2 (Energy Conservation Measure Isolation), it may make sense to directly submeter the equipment in question. For the related tenant M&V credit, EAc5.2, tenant spaces must submetered or independently metered by the electric utility.