New or Changed Tariffs

(a)A utility shall file with the Commission any new or changed tariffs. No new or changed tariff shall be effective unless it is filed with the Commission and either is allowed to go into effect by operation of law or is approved by the Commission.#

(b)A utility may use one of the following filing processes to add a new tariff or to change an existing tariff.#

(I)The utility may file the proposed tariff, including the proposed effective date, accompanied by an advice letter pursuant to rule 1210. The utility shall provide notice in accordance with rule 1207. If the Commission does not suspend the proposed tariff in accordance with rule 1305 prior to the tariff's proposed effective date, the proposed tariff shall take effect on the proposed effective date.#

(II)The utility may file an application to implement a proposed tariff on less than 30-days' notice, accompanied by the proposed tariff, including the proposed effective date. The application shall include the information required in paragraphs 4002(b) and 4002(c); shall explain the details of the proposed tariff, including financial data if applicable; shall state the facts which are the basis for the request that the proposed tariff become effective on less than 30 days' notice; and shall identify any prior Commission action, in any proceeding, pertaining to the present or proposed tariff. If the application is approved by the Commission, the utility shall file a compliance advice letter and tariff which tariff shall be the same in substance as was approved by decision. The advice letter and tariff shall be filed in a new proceeding with the prescribed notice period either in the decision or pursuant to paragraph 1207(g).#

(c)A utility tariff filing, either by an advice letter or an application, that introduces or increases any rate, charge, fee, fare, toll, rental, or classification shall include a rate trend report. The rate trend report shall include:#

(I)the amount of increase and percentage change in the rate, charge, fee, fare, toll, rental, or classification relative to the amount in effect on the date of the utility's filing;#

(II)the amount of increase and percentage change in annual revenues collected by the utility as a result of the utility's filing;#

(III)a chart, graph, or other visualization demonstrating each of the utility's rates, charges, fees, fares, tolls, rentals, or classifications, including base rates and rate adjustment mechanisms, for the ten years prior to the date of the utility filing;#

(IV)a chart, graph, or other visualization demonstrating all of the utility bill line items, including subtotal summary lines, for the ten years prior to the date of the utility filing for each of the utility's customer classes;#

(V)a representation in the chart, graph, or other visualization required by subparagraphs 4109(c)(III) and (IV) of the total of the rates, charges, fees, fares, tolls, rentals, or classifications in effect ten years prior to the date of the utility filing, escalated over the ten years using the United States Bureau of Labor Statistics Consumer Price Index -Denver-Aurora- Lakewood; and#

(VI)for the same rate, charge, fee, fare, toll, rental, or classification as the utility's filing over the ten years prior to the date of the utility's filing:#

(A)the dates when a previous increase or decrease went into effect;#

(B)the amount of the rate, charge, fee, fare, toll, rental, or classification before a previous increase or decrease went into effect;#

(C)the amount of increase or decrease relative to the amount before the previous increase or decrease went into effect;#

(D)the change in annual revenues collected by the utility as a result of the utility's filing; and#

(E)the proceeding number for the tariff filing where the rate, charge, fee, fare, toll, rental, or classification either was allowed to go into effect by operation of law or was approved by the Commission and, in the event a compliance filing resulted in the tariff going into effect by operation of law, the proceeding number of the original proceeding where the rate, charge, fee, fare, toll, rental, or classification was introduced or where an increase in the existing rate, charge, fee, fare, toll, rental, or classification was proposed.#

(d)If the utility files an application to add a new base rate tariff or to change an existing base rate tariff, the Commission shall deem the application complete pursuant to rule 1303 upon certifying by written decision that the filing includes sufficient information, including a comprehensive cost and revenue requirement analysis based on actual, auditable, historical data, which analysis must be accompanied by appropriate workpapers and other supporting materials, to compare test years and to satisfy other purposes as determined by the Commission.#