At issue in this case is the legality of two appropriations passed by the legislature and the consequent effect on the state property tax rate. We have jurisdiction pursuant to 17A A.R.S. Rulеs of the Supreme Court, rule 47(eX5).
Plaintiff-appellant, El Paso Natural Gas Company, Inc. (El Paso), brought suit pursuant to A.R.S. § 42-204 to recover $990,-659.23 of taxes, half of which were paid under protest. Defendаnt-appellees are the state of Arizona, the state treasurer, the state tax commission, individual members of that commission, the department of revenue, the director of the dеpartment of revenue, all 14 counties and their respective treasurers. El Paso alleges that taxes were illegally levied for the Capital Outlay Stabilization Fund and Operating Reserve appropriations passed by the legislature for the fiscal year 1970-71.
In 1970 the Second Regular Session of the Twenty-ninth Legislature enacted a general appropriation bill which made appropriations for the various departments of the state for the fiscal year July 1, 1970, through June 30, 1971. 1970 Ariz.Sess. Laws, ch. 162. Subdivision 104 of that bill appropriated twelve million dollars to a “Capitаl Outlay Stabilization Fund” and Subdivision 105 appropriated twenty million dollars to an “Operating Reserve.” Id. These two appropriations were included in determining the amount to be raised by taxes оn real and personal property in order to meet the budget requirements of the state for the fiscal year ending June 30, 1971. The resulting tax rate was fixed at $1.65 per $100 of assessed valuation for the year 1970. El Paso alleges that had the defendant state tax commission * not computed the tax rate and levied taxes so as to raise, in addition to all other items in the general appropriation bill, the illegal sum of $32,000,000, the tax rate levied against real and personal property would have been $.54 per $100 of assessed valuation.
This appeal presents a number of complex and difficult issues which for clarity and organizational purposes we summarize as follows:
1. Does the decision of the Court of Appeals in State v. Arizona Public Service Co. foreclose El Paso’s claim for relief?
2. Does res judicata apply to taxpayer lawsuits?
3. Do the appropriations violate Article 4, Part 2, § 20 of the Arizona Constitution?
4. Do the appropriations violate Article 9, § 3, ¶ 1 of the Arizona Constitution and A.R.S. § 42-108.01(B)?
*221 5. Do the appropriations violate Article 9, § 3, ¶2, and § 9 of the Arizona Constitution?
6. Do the appropriatiоns violate the separation of powers doctrine as enunciated in Article 3 of the Arizona Constitution?
7. Do the appropriations accord with the Financial Code?
8. Has El Paso satisfied a condition precedent to bringing suit by paying its taxes under prоtest?
APS DECISION
Defendants contend that the decision of the Court of Appeals in
State
v.
Arizona Public Service Co.,
In
Cochise
the State Board of Equalization, which in 1959-60 set the property tax rate, unknowingly used incorrect figures furnished it by the State Superintendent of Public Instruction. The Superintendent had certified to the Board a computation based on average daily high school enrollment rather than average daily attendance as prescribed by A.R.S. § 15-1211. The resulting tax ratе was $1.70 instead of $1.661. We held that the Board of Equalization in relying on the Superintendent’s certification had not acted arbitrarily or fraudulently, nor was the resulting rate grossly excessive.
Our decision in
Cochise
was based оn the assumption that the Board, in carrying out its tax-setting power, had acted judicially.
See
Arbitrariness provides a proper yardstick for judging the actions of an administrative agency when they involve an exercise of discretion,
Schade v. Arizona State Retirement System,
RES JUDICATA
At first blush, the defendants’ reliance on the res judicata effects of the
*222
APS decision seems misplaced. The general rule in sustaining a plea of res judicata requires identity of the parties, the capacity in which they appear, the subject matter, and the cause of action.
Snow v. Kennedy,
Although not denominated as such, this doctrine has been utilized in Arizona. In
Luhrs v. City of Phoenix,
As the doctrine of virtual representation stands in derogation of the general rule that a judgment binds only parties before the court, application of the bar of res judicata in these circumstances demands the utmost caution. The judgmеnt in the prior case must have been a final judgment rendered on the merits by a court of competent jurisdiction.
Hoff v. City of Mesa,
*223
Res judicata is a judicial doctrine grounded in public policy considеrations to insure that at some point there will be an end to litigation.
Lee v. Johnson,
70 Ariz. .122, 127,
Notes
The functions of setting the state property tax rate and levying the tax are now performed .by the joint legislative tax committee and the department of revenue, respectively. A.R.S. § 42-108; A.R.S. § 42-108.01.
