For the purposes of this section, the variable cost to serve new load for purposes of establishing a discount under this section shall be determined using (a) the energy and capacity market prices that underlie the net base energy costs reflected in the revenue requirement from the electrical corporation's most recent general rate proceeding; (b) any operations and maintenance expenses that vary with respect to the total number of customers or load served by the electrical corporation, excluding operations and maintenance expenses associated with generating electricity; and (c) any other incremental costs to serve the customer.
To obtain one of the discounts set forth in subdivision (1) or (2) of this subsection, the customer's load shall be incremental, net of any offsetting load reductions due to the termination of other accounts of the customer or an affiliate of the customer within twelve months prior to the commencement of service to the new load, the customer shall receive an economic development incentive from the local, regional, state, or federal government, or from an agency or program of any such government, in conjunction with the incremental load, and the customer shall meet the criteria set forth in the electrical corporation's economic development rider tariff sheet, as approved by the commission, that are not inconsistent with the provisions of this subsection.
Unless otherwise provided for by the electrical corporation's tariff, the applicable discount shall be a percentage applied to all base-rate components of the bill. The discount shall be applied to such incremental load from the date when the meter has been permanently set until the date that such incremental load no longer meets the criteria required to qualify for the discount, as determined under the provisions of subsection 2 of this section. An eligible customer shall also receive a ten percent discount of all base-rate components of the bill applied to such incremental load for an additional one-year period beyond the period during which the applicable discount under subdivision (1) or (2) of this subsection applies if the electrical corporation determines that the customer is taking service from an under-utilized circuit. The electrical corporation may include in its tariff additional or alternative terms and conditions to a customer's utilization of the discount, subject to approval of such terms and conditions by the commission. The customer, on forms supplied by the electrical corporation, shall apply for the applicable discount provided for by this subsection at least ninety days prior to the date the customer requests that the incremental demand receive one of the discounts provided for by this subsection and shall enter into a written agreement with the electrical corporation reflecting the discount percentages and other pertinent details. If the incremental demand is not separately metered, the electrical corporation's determination of the incremental demand shall control. The electrical corporation shall verify the customer's incremental demand annually to determine continued qualification for the applicable discount. Notwithstanding the foregoing provisions of this subsection, the cents-per-kilowatt-hour realization resulting from application of any discounted rates as calculated shall be higher than the electrical corporation's variable cost to serve such incremental demand and the applicable discounted rate also shall make a positive contribution to fixed costs associated with service to such incremental demand. If in a subsequent general rate proceeding the commission determines that application of a discounted rate is not adequate to cover the electrical corporation's variable cost to serve the accounts in question and provide a positive contribution to fixed costs then the commission shall increase the rate for those accounts prospectively to the extent necessary to do so.
§ 393.1640, RSMo