ruco/thaler v. Acc

CourtCourt of Appeals of Arizona
DecidedNovember 21, 2025
Docket1 CA-SA 25-0209
StatusPublished

This text of ruco/thaler v. Acc (ruco/thaler v. Acc) is published on Counsel Stack Legal Research, covering Court of Appeals of Arizona primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
ruco/thaler v. Acc, (Ark. Ct. App. 2025).

Opinion

IN THE ARIZONA COURT OF APPEALS DIVISION ONE

RESIDENTIAL UTILITY CONSUMER OFFICE; STUART THALER, Petitioners,

v.

ARIZONA CORPORATION COMMISSION, an agency of the State of Arizona; KEVIN THOMPSON, in his official capacity as a member of the Arizona Corporation Commission; NICK MYERS, in his official capacity as a member of the Arizona Corporation Commission; LEA MARQUEZ PETERSON, in her official capacity as a member of the Arizona Corporation Commission; RACHEL WALDEN, in her official capacity as a member of the Arizona Corporation Commission; RENE LOPEZ, in his official capacity as a member of the Arizona Corporation Commission; ARIZONA WATER COMPANY; ARIZONA PUBLIC SERVICE COMPANY; EPCOR WATER ARIZONA, INC.; GLOBAL WATER - SANTA CRUZ WATER COMPANY, INC.; GLOBAL WATER - PALO VERDE UTILITIES COMPANY, INC.; TUCSON ELECTRIC POWER COMPANY, UNS ELECTRIC, INC.; UNS GAS, INC.; LIBERTY UTILITIES (LITCHFIELD PARK WATER & SEWER) CORP., Respondents.

No. 1 CA-SA 25-0209 FILED 11-21-2025

Petition for Special Action from the Superior Court in Maricopa County No. CV2025-011288 The Honorable Susanna C. Pineda, Judge

JURISDICTION ACCEPTED; RELIEF GRANTED COUNSEL

Coppersmith Brockelman PLC, Phoenix By D. Andrew Gaona, Austin C. Yost, Kelleen Mull Counsel for Petitioner Residential Utility Consumer Office

Residential Utility Consumer Office, Phoenix By Daniel W. Pozefsky, Sarah Barrios Cool Counsel for Petitioner Residential Utility Consumer Office

Arizona Center for Law in the Public Interest, Phoenix By Daniel J. Adelman, Chanele N. Reyes Counsel for Petitioner Stuart Thaler

Arizona Corporation Commission, Phoenix By Thomas Van Flein, Mike Dailey, Maureen A. Scott Counsel for Respondent Arizona Corporation Commission

Osborn Maledon, P.A., Phoenix By Mary R. O’Grady, Joseph N. Roth, Michael Moorin Counsel for Respondent Arizona Public Service Company

Osborn Maledon, P.A., Phoenix By Meghan H. Grabel, Phillip W. Londen, Elias J. Ancharski, Jacob E. Abrahamian Counsel for Respondent Arizona Water Company

Papetti Samuels Weiss McKirgan LLP, Scottsdale By Randy Papetti, Lawrence Kasten Counsel for Respondent EPCOR Water Arizona Inc.

Snell & Wilmer LLP, Phoenix By Paloma M. Scheiferstein Counsel for Respondent Global Water – Santa Cruz Water Company, Inc. and Global Water – Palo Verde Utilities Company, Inc.

Global Water Resources, Inc., Phoenix By Robert J. Metli Counsel for Respondent Global Water

2 Snell & Wilmer L.L.P., Phoenix By Michael W. Patten Counsel for Respondents Tucson Electric Power Company, UNS Electric, Inc., UNS Gas, Inc.

Tucson Electric Power Company, Tucson By Megan C. Hill Counsel for Respondent Tucson/UNS

Osborn Maledon, P.A., Phoenix By Timothy J. Sabo Counsel for Respondent Liberty Utilities (Litchfield Park Water & Sewer) Corp.

Arizona Attorney General’s Office, Phoenix By Mary M. Curtin, Andy McCoy Counsel for Amicus Curiae State of Arizona

Holland & Hart LLP, Phoenix By Michelle Brandt King, Austin W. Jensen Counsel for Amicus Curiae Arizona Large Customer Group

Scharf-Norton Center for Constitutional Litigation, Phoenix By Timothy Sandefur Counsel for Amicus Curiae Goldwater Institute

OPINION

Acting Presiding Judge Michael J. Brown delivered the opinion of the Court, in which Judge Cynthia J. Bailey and Judge Veronika Fabian joined.

B R O W N, Judge:

¶1 Petitioners Residential Utility Consumer Office and Stuart Thaler (collectively “RUCO” except as noted), requested a judgment declaring that the Arizona Corporation Commission (“Commission”) improperly authorized utility companies to propose using formula rates in lieu of following traditional ratemaking methods. RUCO filed its complaint under the Administrative Procedure Act (“APA”), which authorizes any person affected by a “substantive policy statement” to seek a judicial declaration on whether the statement “constitutes a rule,” and thus requires compliance with the APA’s rulemaking procedures. See A.R.S. § 41-1034(B).

3 RUCO/THALER v. ACC, et al. Opinion of the Court

The superior court granted the Commission’s motion to dismiss, holding the APA is inapplicable and the complaint was untimely. Because the Commission is subject to the APA, generally, and RUCO timely filed its complaint for declaratory relief, we vacate the court’s ruling and remand for further proceedings.

BACKGROUND

¶2 The Arizona Constitution gives the Commission authority to set rates that a public service corporation (utility) may charge its customers. Ariz. Const. art. 15, § 3; Ariz. Pub. Serv. Co. v. Ariz. Corp. Comm’n, 255 Ariz. 16, 18, ¶ 2 (App. 2023). The Commission’s ratemaking power is full and exclusive. Johnson Utils., L.L.C. v. Ariz. Corp. Comm’n, 249 Ariz. 215, 221, ¶¶ 21, 23 (2020). When setting rates, the Commission “is required to ascertain the fair value of the company’s property and use that value as a rate base for calculating just and reasonable rates.” Residential Util. Consumer Off. v. Ariz. Corp. Comm’n (“RUCO I”), 240 Ariz. 108, 112, ¶ 15 (2016). The Commission may use a “full rate case” to determine fair value or it can utilize alternative methods, including reliance on updated versions of earlier submissions or summarized financial information. Id. at 113, ¶ 19. The full rate case uses a historical test year to calculate rates, with a “test year” defined as the “one-year historical period used in determining rate base, operating income and rate of return.” See Ariz. Admin. Code (“A.A.C.”) R14-2-103(A)(3)(p); Freeport Minerals Corp. v. Ariz. Corp. Comm’n, 244 Ariz. 409, 411, ¶ 7 (App. 2018) (explaining that a rate case determines rates using data from a test year).

¶3 In 2023, the Commission opened a “generic” docket (“Docket”) to consider modifications to the test year rules. Several individuals and entities filed responses or comments. The Commission held a special open meeting in March 2024 to discuss potential changes to the test year rules, including authorizing future use of a formula rate plan. The Commission explained that the plan would use “pre-specified formulas” to “guarantee a return to the utilities – with any costs in excess of expectations given to the customers and any lessened costs paid back to the customer base.”

¶4 In September 2024, RUCO sought leave from the Commission to intervene as a party in interest in the Docket under its statutory authority to intervene or appear on behalf of residential utility consumers before the Commission. See A.R.S. § 40-464(A)(2). A few days later, the Commission issued a procedural order explaining that “[g]eneric and rulemaking dockets do not have parties” and because “there are no parties to this

4 RUCO/THALER v. ACC, et al. Opinion of the Court

matter,” any person desiring notice of the filings in the Docket must sign up to follow it on the Commission’s website.

¶5 After the Commission held a second open meeting, two commissioners filed a draft policy statement on formula rates. In response, the Arizona Attorney General and RUCO filed statements opposing a policy that would allow alternative ratemaking methods, asserting such a change must be enacted through the APA’s rulemaking procedures. The Commission then voted 3-2 to approve the policy statement authorizing use of formula rates. On December 31, 2024, the Commission issued an order, Decision No. 79647 (“Decision”), setting forth findings of fact and conclusions of law, and formally adopting the policy statement.

¶6 Although not a party, RUCO applied for rehearing and the Commission denied the application on February 19, 2025.

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