delivered the opinion of the court:
James and Linda Panchinsin, California residents, filed a tort action in Illinois on June 15, 1981, based on injuries allegedly suffered by James in California on June 17, 1979. Their lawsuit would have been barred in California by a one-year statute of limitations (compare Cal. Civ. Proc. Code secs. 312 and 340 (West 1982), with Ill. Rev. Stat. 1981, ch. 110, pars. 13 — 202, 13 — 203), and the defendants
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moved to dismiss on the grounds that the plaintiffs were precluded from bringing an action in Illinois by operation of the so-called borrowing statute (Ill. Rev. Stat. 1981, ch. 110, par. 13 — 210). In response the plaintiffs argued that the borrowing statute is not applicable because the defendants allegedly are residents of Illinois. See Coan v. Cessna Aircraft (1973),
The trial court denied the motions to dismiss, but certified that ultimate termination of the case would be materially advanced by interlocutory appeal of its order and the following questions of law:
(1) Whether the borrowing statute applies to actions brought against Illinois residents; and
(2) Whether it violates the equal protection clauses of the United States and Illinois constitutions (U.S. Const., amend. 14, sec. 1; Ill. Const. 1970, art. I, sec. 2) to provide that the borrowing statute is not applicable to defendants who are Illinois residents.
We granted leave to appeal from the trial court’s interlocutory order (see 87 Ill. 2d R. 308), and we affirm.
The key issue in resolution of the first question is whether this case is controlled by the holding of Coan v. Cessna Aircraft (1973),
“When a cause of action has arisen in a state or territory out of this State, or in a foreign country, and, by the laws thereof, an action thereon cannot be maintained by reason of the lapse of time, an action thereon shall not be maintained in this state.” Ill. Rev. Stat. 1969, ch. 83, par. 21, now recodified at Ill. Rev. Stat. 1981, ch. 110, par. 13 — 210.
In deciding Coan the supreme court sought to determine the intent of the General Assembly which enacted this law, and after stating that “[i]t is reasonable to conclude that [the borrowing statute] was intended to apply only to cases involving nonresident parties” (
The defendants in the present case argue that Coan is not binding precedent because it concerned a plaintiff who was an Illinois resident, whereas the Panchinsins were and are California residents. They also contend the court merely provided a nonbinding obiter dictum when it stated that “[i]t is reasonable to conclude that [the borrowing statute] was intended to apply only to cases involving nonresident parties.” (
The doctrine of stare decisis — a basic tenet of our legal system (Hoffman v. Lehnhausen (1971),
The ratio decidendi of a case is “the principle of law which is the basis of the actual decision and therefore, by virtue of the doctrine of stare decisis, the principle which subsequent courts, faced with a set of facts indistinguishable in any material particular from those in the precedent case, must apply to the decision of the subsequent case also.” (Walker, The Oxford Companion to Law 1033 (1980).) Conversely, “[a] court may not speak authoritatively upon questions not involved in the litigation” (Boddiker v. McPartlin (1942),
According to the defendants, the material fact which distinguishes Coan from the present case is that Coan was an Illinois resident who, by happenstance, was injured in another State. Focusing on this as the key fact in Coan, the defendants contend the ratio decidendi of that case is that Illinois has an overriding interest in permitting an injured Illinois plaintiff to maintain an action in Illinois even though the action would have been barred in the State where it arose, and that “equitable considerations may militate against a strict application of the Borrowing Statute, particularly in instances where an Illinois resident plaintiff fortuitously suffers injury out of state.” See, e.g., Templeman v. Baudhuin Yacht Harbor, Inc. (1st Cir. 1979),
However, examination of the Coan opinion shows that under the court’s analysis it is immaterial whether the plaintiff or the defendant was an Illinois resident, and that the material fact was that the case did not involve a plaintiff and defendant who were both nonresidents. The court started by stating that both plaintiff and at least one defendant were Illinois residents (
We find that the material fact in- Coan v. Cessna Aircraft was that the case did not involve nonresidents, and that the legal principle which justified the decision which the court reached based on this material fact (i.e., the ratio decidendi of the case) is that the borrowing statute “was intended to apply only to cases involving nonresident parties.” (
We acknowledge that the defendants forcefully argue Coan was wrongly decided, but we lack authority to modify or overrule the supreme court’s decisions, and such arguments are unavailing in this tribunal.
We also note that a portion of the tolling statute was declared unconstitutional in Haughton v. Haughton (1979),
The next question is whether the defendants have been deprived of equal protection of the laws. (See U.S. Const., amend. 14, sec. 1; Ill. Const. 1970, art. I, sec. 2.) According to the defendants, it is unconstitutional for Illinois to provide that defendants who are Illinois residents cannot take advantage of the Illinois borrowing statute.
“The Equal Protection Clause provides a basis for challenging legislative classifications that treat one group of persons as inferior or superior to others, and for contending that general rules are being applied in an arbitrary or discriminatory way.” (Jones v. Helms (1981),
Illinois residency is not a historically suspect classification such as race, religion, or alienage, and the decision of the Illinois General Assembly to “discriminate” against all the residents of Illinois does not implicate the fundamental right to travel from State to State. Moreover, the “shelter [of statutes of limitation] has never been regarded as what now is called a ‘fundamental’ right or what used to be called a ‘natural’ right of the individual.” (Chase Securities Corp. v. Donaldson (1945),
“In determining whether a challenged classification is rationally related to achievement of a legitimate state purpose, we must answer two questions: (1) Does the challenged legislation have a legitimate purpose? and (2) Was it reasonable for the lawmakers to believe that the use of the challenged classification would promote that purpose?” (Western & Southern Life Insurance Co. v. State Board of Equalization (1981),
Under this deferential standard of review a statutory classification is valid if the court can reasonably conceive of any set of facts which would justify the law. (McGowan v. Maryland (1961),
In the present case the defendants argue there is no rational reason for providing that Illinois residents cannot take advantage of the Illinois borrowing statute. As noted above, application of the borrowing statute to the present case would mean the defendants (who are allegedly Illinois residents) would be shielded from liability under the one-year California statute of limitations, rather than being exposed to potential liability through operation of the Illinois limitation period of two years. However, it is reasonably conceivable that the legislature could have concluded (1) Illinois residents who commit torts are likely to injure other Illinois residents, and (2) refusing to permit Illinois residents to take advantage of a shorter than generally available limitations period (through application of the borrowing statute) would promote the health, safety, and welfare of our citizens by encouraging Illinois residents to maintain high safety standards.
These factual assumptions may not stand up to rigorous scientific scrutiny, but the defendants have failed to meet their burden of showing that the issue was not "debatable” (United States v. Carotene Products Co. (1938),
Based on the reasons given above, the order of the circuit court is affirmed.
Affirmed.
SULLIVAN and MEJDA, JJ., concur.
Notes
Metalglas Industries, Inc., Insilco Home Products Corporation d/b/a The Enterprise Companies, Hercules Incorporated, Hercules Chemical Corporation, M & T Chemicals, Inc., Union Carbide Company, The Dow Chemical Company, Ashland Oil, Inc., Ashland Chemical, Inc., E. I. DuPont-DeNemours Company, DeGussa, Inc., Mo-bay Chemical and Baychem Corporation, and Bashkar Urs.
