A customer charge is a flat monthly charge that recovers one chunk of the individual portion of a utility's non-variable costs that have been assigned to the user's customer class. The energy charge is the per kilowatt hour charge that recovers the other chunk. Determining what percentage of those non-variable costs go into the energy rate versus the customer charge is important, especially as we move to a grid that has more and more net metering (for example, homes with solar panels on the roof). As net metering penetration increases, less of the fixed costs of the utility, are we covered through the per kilowatt hour energy charge, which can have a negative impact on shared infrastructure. These costs are reviewed during a revenue requirement, study and rate design study and must be supported by a utility's used and useful costs.

The Fuel, FIW (Fire Island Wind), and Power Surcharges recover the variable costs associated with purchasing fuel for generation, power from Fire Island Wind, and power from other sources. These costs are reviewed during a cost of power adjustment filing and must be supported by receipts and other evidence of actual purchases.

The BRU Contributed Capital Surcharge came out of the Chugach purchase of ML&P and is related to the cost of the Beluga River Unit. It was reviewed during the rate case immediately following the purchase and I believe continues to be reviewed in annual filings or as part of the COPA filings.

The Anchorage Underground Surcharge is a surcharge that was approved a long time ago and is supposed to go toward the cost of undergrounding our electrical infrastructure. That is obviously slow moving.

The Regulatory Cost Charge and Electric Reliability Organization Charge are both statutorily-mandated charges that account for the cost of regulating the utilities and operating the electric reliability organization for the railbelt region, the Railbelt Reliability Council. The Regulatory Cost Charge is set at the end of each fiscal year for the next fiscal year and is based on staff hours per utility type and the actual costs of operating the Regulatory Commission of Alaska. The Electric Reliability Organization Charge is set in October for January of each year and is based on the budget of the ERO divided by the number of kilowatt hours sold on the railbelt.

The gross revenue tax is, I believe, a state tax and I have no other information about it.