delivered the opinion of the court:
This appeal concerns utility rates which were originally set by order of the Illinois Commerce Commission in 1971. On an appeal involving the rates this court held that the Commission had improperly allowed certain expenses and deductions to the Illinois Bell Telephone Company (hereafter Bell) (Illinois Bell Telephone Co. v. Illinois Commerce Com. (1973),
In the first appeal, this court held that the Commission in its 1971 rate order had improperly allowed certain costs of Bell as operating expenses. (Illinois Bell Telephone Co. v. Illinois Commerce Com. (1973),
We first address the IVI’s contention that Bell customers should receive restitution for the time that the rate order was in effect, from August 11, 1972, to October 1, 1973, the time of this court’s previous decision. Bell, according to the IVI, should be required to “disgorge” the rate amounts overpaid by its customers under the portions of the Commission’s order this court held to be invalid. The IVI contends that the reparations remedy provided in section 72 of the Public Utilities Act (Ill. Rev. Stat. 1971, ch. 111⅔, par. 76) (the Act) does not preclude restitution of rates paid under a Commission order that was later judicially reversed. Section 72 provides that the Commission, after a hearing at which it has found that a public utility has charged an excessive or unjustly discriminatory amount for its product, commodity or service, may order the utility to make statutory reparation to the complainant. (Ill. Rev. Stat. 1971, ch. 111⅔, par. 76.) The IVI contends that restitution is a post-appeal remedy that should be available upon judicial reversal of erroneous rate orders through section 68 of the Act (Ill. Rev. Stat. 1971, ch. 111⅔, par. 72), which is the authority for appellate review of Commission orders. Section 68 provides that a circuit court may review Commission actions to inquire into and determine the lawfulness and reasonableness of the rule, regulation, order, or decision. The Act, the IVI says, is silent about restitution, so it is not a prohibited remedy.
This appeal is brought under section 68 of the Act (Ill. Rev. Stat. 1971, ch. 111⅔, par. 72). Under the statute the review of Commission findings is limited to questions of whether the Commission acted within the scope of its authority, whether the finding is without any reasonable foundation in the evidence, or whether a constitutional right has been infringed by such findings. (Citizens Utilities Co. v. Illinois Commerce Com. (1971),
The Commission contends the IVI has waived its right for restitution because it failed to raise the issue in its petition for rehearing before the Commission. Section 67 of the Act (Ill. Rev. Stat. 1971, ch. 111⅔, par. 71) prohibits appeals upon grounds not raised in the application for rehearing. A review of the record shows the IVI did raise the question of restitution in its petition for rehearing in stating that it was “not simply requesting ‘reparations’,” but was also seeking refunds of amounts overpaid. We judge that the IVI sufficiently articulated its claim for restitution in the petition to preserve it for appeal, and we now consider the merits of the IVI’s argument that Bell customers are entitled to the amounts they paid under the portions of the 1971 rate order that were held improper by this court in the previous appeal.
The appellate court, relying on Mandel Brothers, Inc. v. Chicago Tunnel Terminal Co. (1954),
The IVI argues that Mandel Brothers is not applicable here because that case dealt with a reparations claim, while this appeal involves the duty of the Commission to rectify its errors on remand by granting restitution. Alternatively, the IVI says that if the Commission does not have the power to order restitution, then this court should exercise its equitable powers to order restitution. The Commission and Bell argue, and the appellate court held, that the Commission is prohibited from granting restitution because reparations under section 72 is the only statutory remedy. The Commission also says that, since this appeal is brought under section 68 of the Act (Ill. Rev. Stat. 1971, ch. 111⅔, par. 72), this court is limited to the statutory scope of review. It says that reviewing courts do not exercise equitable powers in review of Commission orders, and thus restitution cannot be ordered here. Whether the administrative remedies of the Act preclude the Commission or this court from granting restitution for the period before the rate order was judicially reversed need not be resolved, as restitution is not called for under the circumstances. Restitution is an equitable remedy that is sought before a court, and the basis of such liability is unjust enrichment to the defendant. (G. Palmer, Restitution, sec. 1.1, at 2 (1978).) Restitution is compelled against one who has obtained money or property without authority and usually where an adequate legal remedy does not exist for the aggrieved party. (G. Palmer, Restitution, sec. 1.6, at 35 (1978).) This court has already determined that a Commission-approved rate order cannot be deemed excessive for reparations purposes if the Commission found it reasonable and just, although it is later set aside by a reviewing court, because section 71 provides that the order shall remain in effect during the pendency of an appeal, unless it is stayed or suspended. Bell, as a public utility, was prohibited from charging more or less than the rates set by the Commission (Ill. Rev. Stat. 1971, ch. 111⅔, par. 37) and was statutorily required to follow the 1971 rates set by the Commission. Since Bell was required by statute to collect the new rates, which were found just and reasonable by the Commission, Bell has received no unlawful charges of which it should be “disgorged” under restitutional principles.
The IVI also argues that if Mandel Brothers forbids refunds to Bell customers in this situation, it should be overruled. The IVI acknowledges that Mandel Brothers concluded that a party must have obtained a stay or suspension, in whole or in part, to avoid payments under rates that were approved by the Commission. The legislature, the IVI argues, could not have intended stay orders to be the only method available to avoid the permanent effects of rate orders that are later judicially reversed. Since our decision in Mandel Brothers, the legislature has amended the Act (Ill. Rev. Stat. 1985, ch. 111⅔, par. 1 — 101 et seq., eff. Jan. 1, 1986). The Act’s stay provisions were amended so that a bond shall not be required in the case of any stay or suspension granted on application of the State, represented by the Attorney General or Public Counsel (Ill. Rev. Stat. 1985, ch. 111⅔, par. 10 — 204). The legislature did not amend the Act to change this court’s construction in Mandel Brothers that the Act prohibits refunds of amounts overpaid by utility customers during the pendency of an appeal, unless the rate order had been stayed or suspended. Too, the legislature has twice declined to enact proposals that would have allowed the Commission to adjust temporarily rates to provide the public utility with the increased or decreased revenue it would have received during the pendency of an appeal if the final order as originally promulgated by the Commission had been in accord with the opinion of the highest court to which the appeal was taken. (H.B. 1173, 80th Ill. Gen. Assem., 1977-78; H.B. 2059, 81st Ill. Gen. Assem., 1979-80.) Either of these legislative proposals would, if enacted, have amended the Act differently from the construction given by this court in Mandel Brothers. The legislature’s reenactment of a statute, which has been judicially construed, should be viewed as an adoption of that particular construction. (2A Sutherland, Statutory Construction sec. 49.10, at 408 (1984 rev. ed.); see also Union Electric Co. v. Illinois Commerce Com. (1979),
The IVI, amicus CUB, and amicus Public Counsel claim that the stay provision of the Act is unconstitutional because no customer or group can reasonably be expected to furnish a bond that would be sufficient to make the utility whole in the event that the stay is eventually reversed. The IVI says it was not financially able to post a bond pursuant to section 71 of the Act to stay the Commission’s order and, therefore, was not able to avail itself of the remedies under the Act. CUB and Public Counsel contend that the appellate court’s decision raises constitutional questions under the due process clause of the fourteenth amendment of the United States Constitution and article I, section 2, of the Constitution of Illinois. CUB also contends that the General Assembly cannot constitutionally deprive the courts of providing a remedy under these circumstances. CUB, however, concedes that this court need not address the constitutional issue as there is no provision in the Act purporting to take away equitable jurisdiction. The Commission and Bell say that the IVI waived this argument because it had not sought a stay of the original rate order and also because it had not raised the constitutionality issue before the Commission or in its petition for rehearing as required by section 68 (Ill. Rev. Stat. 1971, ch. 111⅔, par. 72). The IVI did, in one of its memoranda before the Commission, question the constitutionality of section 71 as violative of the fifth and fourteenth amendments, but it did not specify this point as a ground for rehearing, which would have preserved it for review. We agree with the appellate court’s disposition of this argument: that it was waived by the IVI’s failure to either seek a stay or raise the issue before the Commission. People v. Lang (1986),
The IVI, relying on decisions from other jurisdictions, also argues that courts have fashioned equitable relief for customers when they have invalidated rate orders and no other legal remedies are available. The courts in two of the decisions cited by the IVI, Mountain States Telephone & Telegraph Co. v. Arizona Corporation Com. (Ariz. App. 1979),
The IVI next argues that, even if Bell customers are not entitled to restitution for the period preceding the date when the 1971 rate order was reversed by this court, the customers should at least be able to recover refunds for the time that the rate order remained in effect following this court’s decision. The parties agree that Mandel Brothers did not address the issue of the rates that are effective when a reviewing court reverses a Commission order and no stay has been obtained. In the IVI’s view, once a Commission order is reversed, the order is no longer valid. The appellate court decided that a public utility is entitled to charge rates in reliance upon a Commission order until replaced by further order of the Commission. (
We consider that the IVI correctly states that Bell was not entitled to the full amount allowed under the 1971 rate order after portions of it were held invalid by this court. The judgment of a reviewing court is final when entered. (Long v. City of New Boston (1982),
The Commission argues that the appellate court’s decision on this issue should be affirmed and that a rate order should remain in effect after judicial reversal because of the comprehensive legislative scheme controlling utility rates. The Commission correctly observes that section 37 of the Act (Ill. Rev. Stat. 1971, ch. 111⅔, par. 37) prohibits the public utility from charging more or less than the rates set forth in Commission-approved schedules. The Commission argues these rates remain in effect even after this court holds that a portion is unlawful. The Act specifically authorizes the utility company to collect the rates during the pendency of an appeal, unless a stay or suspension is obtained. But once that rate order is set aside on appeal, the utility should not continue to benefit from what has been determined to be unlawful portions of a rate increase. Peoples Gas Light & Coke Co. v. Slattery (1939),
The Commission also argues that, because rate-making is legislative in nature, the Commission, not the courts, is empowered to set public utility rates. The Commission is statutorily authorized to change rates and, because rate-making is legislative in nature, rates can be changed only prospectively. (Mandel Brothers, Inc. v. Chicago Tunnel Terminal Co. (1954),
Bell also argues that the 1971 rates that had been approved by the Commission were actually too low to provide the revenue it needed, and therefore it says the continued collection of the 1971 rates after reversal produced no unjust enrichment that would be the basis of refunds to its customers. The Commission, in setting new rates after reversal of the 1971 rate order, allowed Bell a rate increase totaling $58.6 million. Bell overlooks, though, that it was allowed to collect from October 1, 1973, the date of this court’s previous decision,, through January 1, 1974, the improper portions of the previous rate schedule. The refunds ordered here should be comprised of the difference between the original rates set in the 1971 rate order and the rates that would have been charged if they had been set in accordance with the views expressed in the previous decision for the period between reversal by this court and the effective date of the new rate order.
We also note that preparing and sending refund checks to the thousands of customers served by Bell may not be the most cost-effective method of effectuating our decision, and we perceive no ground for objection if credits to the customers’ monthly bills were used, if the Commission deems this to be a preferable procedure. See Appeal of Granite State Electric Co. (N.H. 1980),
For the reasons given here, the judgments of the appellate and circuit courts are affirmed as to those portions holding that there is no entitlement to refunds for the period preceding the reversal of the rate order by this court; and the judgments are reversed as to those portions denying refunds for the period following reversal of the rate order by this court. This cause is remanded to the Commission with directions to order Bell to provide refunds or credits in accordance with the views expressed herein.
Appellate court affirmed in part and reversed in part; circuit court affirmed in part and reversed in part; cause remanded, with directions.
JUSTICE GOLDENHERSH took no part in the consideration or decision of this case.
