delivered the opinion of the court:
This is аn appeal from an order of the circuit court of Fayette County reversing an order of the Illinois Commerce Commission fixing rates for the Monarch Gas Company.
On November 21, 1974, Monarch Gas Company filed proposed tariff revisions for its general serviсe area which would increase revenue by approximately *58,000 per year. Pursuant to statutory authority, the Illinois Commerce Commission suspended the increase until April 20, 1975, and later extended the suspension until September 25, 1975. On September 25,1975, the Commission enterеd its order granting a portion of the proposed tariff increase. The increase raised the rate of return on Monarch’s original investment minus depreciation to 8.75%.
The Commission found that in 1970 Monarch had elected, pursuant to Subchapter S of the Internal Revenue Code (26 USC §1371 et seq.) to be taxed through its stockholders on the taxable, income of the corporation, in lieu of paying the corporate tax. As Monarch itself paid no income tax, the Commission rejected the inclusion of the amount thе corporation would have paid in computing the operational expenses. Pursuant to section 68 of the Public Utilities Act (111. Rev. Stat. 1975, ch. Ill 2/3, par. 72), this portion of the Commission’s order was appealed to the circuit court. The Commission now appеals from the reversal of its order by the Circuit Court.
In this appeal the Commission notes that judicial review of its orders is limited by statute, and contends that the evidence fully supports its order. Monarch contends that the rejection of income tax expenditures frustrаtes the purpose of the tax code and is thereby unlawful. Monarch also urges that the failure to include income tax expenditures as an operating expense lowers the rate of return to 6.19%, below the 8.75% rate the Commission allowed. Finally, Monarch argues that the Commission is estopped from rejecting its claimed expense by its failure to object to the income tax expenses in the annual report by Monarch to the Commission following its Subchapter S election in 1970.
The authority to review and the scope of review of Illinois Commerce Commission orders derives from section 68 of the Public Utilities Act (Ill. Rev. Stat., ch. Ill 2/3, par. 72). The findings and conclusions of the Commission are held to be prima facie true and will not be set aside unless against the manifest weight of the evidеnce. In review, the courts are limited to a determination of (1) whether the Commission acted within the scope of its authority, (2) whether it made findings in support of its decision, (3) whether the findings have substantial support in the record, and (4) whether constitutional rights have been violated. (Illinois Bell Telephone Co. v. Illinois Commerce Com.,
The determination of rates is historically a legislative, not a judicial, function. (Illinois Central R.R. Co. v. Illinois Commerce Com.,
A public utility is entitled to a fair return on the value of the property used in service to the public. In order to achieve the fair rate of return, the rates set by the Commission must be sufficient to cover operating expenses, depreciation, necessary reserves and provide for the Commission determined rate of return. (Illinois Bell Telephone Co. v. Illinois Commerce Com.,
Monarch contends that the purpose of Subchapter S would be frustrated if income taxes were not included in operating expenses. We do not agree. It is true, as Monarch contends, that the Subchapter S method of attributing income directly to stockholders does not convert the corporate entity into a partnership. (Unitеd States v. Silverman,
Illinois courts have dealt with the relationshiр of the Internal Revenue Code and the rate regulation of public utilities only infrequently. In City of Alton v. Commerce Com.,
“We must remember, furthermore, that we are not here dealing with the tax treatment of utilities but with the pricing of their product, that is, with the rate charged for their services. Congress has provided that all corporations may reduce their taxes by accelerated depreciation. It has not required the money thus retained to be used for expansion.” (City of Alton v. Commerce Com.,19 Ill. 2d 76 , 89,165 N.E.2d 513 .)
In reversing the Commission order, the сourt noted that while the continuous deferral of taxes due is within the discretion of the Commission, the benefit of the election of the accelerated depreciation must go to the ratepayers, and not to the utility shareholders.
In Federal Power Com. v. United Gas Pipe Line Co.,
“There is no frustration of the tax laws inherent in the Commission’s action. The affiliated group may continue to file consolidated returns and through this mechanism set off system losses against system income, including United’s fair return income. The tax law permits this, but it does not seek to contrоl the amount of income which any affiliate will have. Nor does it attempt to set United’s rates. This is the function of the Commission, a function performed here by rejecting that part of the claimed tax expense which was no expense at all, by reducing the сost of service and therefore rates, and by allowing United only a fair return on its investment.” Federal Power Com. v. United Gas Pipe Line Co.,386 U.S. 237 , 246-47,18 L. Ed. 2d 18 , 26,89 S. Ct. 55 .
We find the rationale of these cases to be persuasive. Subchapter S permits a corporation to eleсt to “pass-through” its income and thereby avoid a double tax on the income. It does not purport to control the determination of the operating expenses and rates of public utilities. This function is properly vested in the Illinois Commerce Commission. The Commission exercised its discretion by rejecting a claimed expense that was not in fact paid by the company. Its findings were supported by substantial evidence in the record and were not against the manifest weight of the evidence. No error of law оr abuse of discretion was committed.
As we find the Commission properly rejected the claimed expense, Monarch’s second contention must also fail. The Commision granted an 8.75% rate of return. Monarch does not question the reasonableness of this rate, but instead alleges that its effective rate of return was only 6.19% due to the Commission’s failure to include income tax expenses in the operating expenses. As the income tax expense was properly rejected, the contention is without merit.
Nor is Monarch’s claim of estoppel meritorious. In 1970, Monarch elected to file as a Subchapter S corporation and has continued to do so. In its annual reports to the Commission, Monarch has included income taxes as an element of its еxpenses. No objection by the Commission was conveyed to Monarch. Monarch’s tariff remained constant during the period as no increases were sought. Monarch relies on section 8 (providing for the general supervision of utilities by the Commission) and section 19 (providing for the correction of erroneous or defective reports) of the Public Utilities Act (Ill. Rev. Stat. 1975, ch. Ill 2/3, pars. 8 and 19) for its claim of estoppel.
The party claiming estoppel must prove the facts and circumstances entitling it to estoрpel by clear and unequivocal evidence. (Spence v. Washington National Insurance Co.,
“Estoppel is based on the principle that the party estopped has by word or conduct, affirmatively or negatively, intentionally or through culpable negligence, induced another to believe and act on such words and conduct, and as a consequence would suffer injury if contrary assertions or denials were allowed.” Jennings v. Bituminous Casualty Corp.,47 Ill. App. 2d 243 , 249-50,197 N.E.2d 513 .
In this case, Monarch has received, and will continue to receive, the fair rate of return to which it is statutorily entitled. It has not shown the necessary injury or reliance required to invoke the doctrine of estoppel.
In addition, another principle militates against Monarch’s claim of estoppel. Estoppel against public bodies is not favored, and exceptional circumstances are required bеfore the doctrine will be invoked. (People ex rel. Brown v. Illinois State Troopers Lodge No. 41,
“It is said that since the State cannot be sued without its consent, an inevitable consequence is that it cannot be bound by estoppel. More importantly, perhaps, is the possibility that application of laches or estoppel doctrines may impair the functioning of the State in the discharge of its government function, and that valuable public interests may be jeopardized or lost by the negligence, mistakes or inattention of public officials.” Hickey v. Illinois Central R.R. Co.,35 Ill. 2d 427 , 447-48,220 N.E.2d 415 .
The Illinois Commerce Commission, in its rate-setting function, acts as a proteсtor of the public interest in seeking to keep rates as low as possible while insuring the utility a fair and reasonable rate of return. (Village of Apple River v. Illinois Commerce Com.,
For the foregoing reasons the order of the circuit court of Fayette County is reversed and the order of the Illinois Commerce Commission is affirmed.
Reversed.
CARTER, P. J., and JONES, J., concur.
