Fuel Adjustment Charge (FAC) – By order of the Commonwealth Public Utilities Commission, CUC is authorized to adjust the FAC rate, previously known as Levelized Energy Adjustment Clause or LEAC, depending on the price of oil. Adjustments are made when the “Mean of Platts Singapore” monthly pricing equals or exceeds a 4.5% differential of the average per gallon cost of fuel used in the calculation of the Fuel Adjustment Charge.