delivered the opinion of the court:
In this сourt’s previous decision in this matter, the Pollution Control Board was directed to reconsider its issuance of certain rules in light of then recent legislative and administrative developments. (Commonwealth Edison Co. v. Pollution Control Board (1976),
This controversy has its origin in administrative proceedings commenced beforе the Board in 1971 pursuant to the mandate of the Federal Clean Air Act of 1970 (42 U.S.C. sec. 1857 et seq. (1970)). That law requires States to develop programs geared to achieving compliancе with Federal pollution control guidelines.
On April 13, 1972, the Board adopted rules establishing particulate and sulfur dioxide emission limits. Commonwealth Edison Company was a party to the procеedings, and it sought review of the rules in the appellate court. That court found that evidence of “technical feasibility and economic reasonableness” (see Ill. Rev. Stat. 1973, ch. 1111/2, par. 1027) was lacking, and it vacated the rules and remanded for further consideration, (Commonwealth Edison Co. v. Pollution Control Board (1974),
After allowing the Board’s petition for leave to appeal from that 1974 decision, this court affirmed the appellate court’s decision to remand, but, unlike the appellate court, this court did not determine the validity of the rules. Spеcifically, the court said:
“In view of the Board’s order of March 7, 1974, directing new inquiry hearings on the precise issues we are here asked to consider, the extensive hearings that have bеen held and the ‘wealth of new information’ that has been gathered in those hearings, and the recent legislation authorizing the use of intermittent control systems until December 31, 1985, under conditions рrescribed by the Board in lieu of compliance with sulfur dioxide emission standards [see Ill. Rev. Stat. 1977, ch. 1111/2 pars. 1003(r) and 1010(h)], we decline to determine the validity of Rules 203(g)(1), 204(a)(1) and 204(c)(1)(A) on the basis of evidence adduced at hearings held in 1970, 1971, and 1972 and the Board’s opinion of April 13, 1972.” (Commonwealth Edison Co. v. Pollution Control Board (1976),62 Ill. 2d 494 , 503.)
The court then also noted that no enforcement proceеdings were pending against Commonwealth Edison and that it had been granted conditional variances from simultaneous compliance with the rules. Commonwealth Edison Co. v. Pollution Control Board (1976),
Upon remand, the Board “validate[d] ” the rules as previously drafted. The order “validating] ” the rules, entered on July 7, 1977, specified that the order was subject to a 45-day comment period аnd that, unless modified, the “validation” of the rules would become effective on September 1, 1977. Judicial review was again sought by several parties who had appeared before the Board. Ashland Chemical Company filed a petition for review in the Third District Appellate Court, and Commonwealth Edison Company and the village of Winnetka each filed petitions in the First District Appellate Court. The State Chamber of Commerce, the city of Rochelle, Abbott Laboratories, and Caterpillar Tractor Company also collectively filed, in thе First District Appellate Court, two separate petitions, one before the effective date of the regulations and another following that date.
In Ashland Chemical Co. v. Pollution Control Board (1978),
Involved in the present appeal are three of the four petitions for review filed in the First District Appellate Court. These three petitions were consolidated by that court, and they include the petition of the village of Winnetka and the two petitions filed collectively by the State Chamber of Commerce, the city of Rochelle, Abbott Laboratories, and Caterpillar Tractor Company. Only the petition of Commonwealth Edison Company was not consolidated; it remains pending in the First District.
In addressing the three petitions for review involved in the prеsent appeal, the First District Appellate Court agreed on all points with the Third District’s decision in Ashland Chemical. (Illinois State Chamber of Commerce v. Pollution Control Board (1978),
Because of our disposition of this appeal, we find it necessary to address only petitioners’ argument that the Board is estopped from again litigating the issues decided adversely tо the Board in the Third District’s Ashland Chemical decision. Following that decision, the Board’s attorney notified the Third District clerk that his client, the Board, had directed that no appeal be takеn. The attorney’s letter evidences his reluctance to follow the directive, but he nonetheless informed the clerk that the Board would not appeal. The Board then commеnced new hearings, not pursuant to the Ashland Chemical remand order but because of legislative amendments “and as part of its on-going examination of its regulations” (In re Particulate Emissiоns, Docket Nos. R78 — 15, R78 — 16 (Nov. 30, 1978); In re Sulfur Dioxide Emissions, Docket Nos. R77-15, R78-14 (Nov. 16, 1978)). At the same time, the Board continued to oppose the three petitions for review involved herein, and, following the decision below by the First District, it prosecuted the present appeal.
The Board’s action, seeking the redetermination in this court of issues decided in Ashland Chemical, promotes multiplicity оf litigation and cannot be condoned. It is now estopped from relitigating the issues decided against it in Ashland Chemical. We acknowledge that the petitioners in this case were not рarties to the Ashland Chemical review proceedings and that, under the mutuality of estoppel concept, a claim of estoppel would not lie. We nonetheless believe that estoppel may be applied in the situation here presented. “The recent trend in the law in this area is to discard the identical-parties-mutuality rule entirely and to require that only one party or his privy, the one against whom estoppel is attempted to be used, be identical in the second action, especially when estoppel is urged dеfensively. (See Bernhard v. Bank of America (1942),
The Board’s appeal is accordingly dismissed. We note that, by dismissing the Board’s appeal, the judgment of the First District Appellate Court remains in effect, to be followed, along with Ashland Chemical, by the B oard.
Appeal dismissed.
