A commercial or industrial electric customer that installs or modifies an electric energy efficiency improvement under a property assessed clean energy program is exempt from the energy optimization charges the customer would otherwise incur under section 89 or 91 of the clean, renewable, and efficient energy act, 2008 PA 295, MCL 460.1089 and 460.1091, if the customer conducts a self-directed energy optimization plan under and subject to the applicable requirements of section 93 of the clean, renewable, and efficient energy act, 2008 PA 295, MCL 460.1093. These requirements include, but are not limited to, the requirement that the plan provide for aggregate energy savings that each year meet or exceed the energy optimization standards based on the electricity purchases in the previous year for the site or sites covered by the self-directed plan.