Douglas, J.
The question that has been certified for our consideration is as follows: “When does a cause of action for underinsured motorist coverage accrue so as to determine the law applicable to such a claim?” In the cases that are presently before us, the Montgomery County Court of Appeals held that Ross’s and Davis’s (hereinafter collectively “appellants”) rights to underinsured motorist coverage did not accrue until appellants had exhausted the tortfeasors’ available liability coverage. Because this condition precedent, i.e., settlement with the tortfeasor, occurred after the effective date of Am.Sub.S.B. No. 20, the court of appeals held that the version of R.C. 3937.18 that was enacted as part of Am.Sub. S.B. No. 20 controlled the determination whether appellants were entitled to [285]*285underinsured motorist coverage. In reaching this conclusion, the Montgomery County Court of Appeals found its holdings in Ross and Davis to be in conflict with the judgment of the Court of Appeals for the Fifth Appellate District in Brocwell and the judgment of the Court of Appeals for the Ninth Appellate District in McBee. In Brocwell and McBee, the appellate courts determined that the law in effect on the date of the accident controls the determination whether the insured is entitled to underinsured motorist coverage.
Considering the foregoing, and, further, that the date of the contract of insurance has also been presented by the parties for our consideration, we construe the issue before us to be a choice among date of contract, date of accident, and date of exhaustion in considering what, if any, effect subsequent legislation might have on the relationship between an insurer and its insured. For the reasons that follow, we find that the Montgomery County Court of Appeals erred in determining that the version of R.C. 3937.18 that was enacted as part of Am.Sub.S.B. No. 20 was the applicable law governing appellants’ claims for underinsured motorist coverage.
I
Appellee argues, and the Montgomery County Court of Appeals agreed, that an insured’s right to underinsured motorist benefits accrues when certain contractual preconditions to such coverage are met. According to appellee, the contractual preconditions of appellants’ automobile insurance policies required appellants to exhaust all applicable liability coverage before appellants could access their underinsured motorist coverage. Thus, appellee contends that appellants’ claims for underinsured motorist coverage did not accrue until they had settled with the tortfeasor, thereby exhausting the tortfeasor’s available liability coverage. Since that exhaustion did not occur until after Am.Sub.S.B. No. 20 went into effect, appellee asserts that, pursuant to the statutory law in effect, appellants were not entitled to underinsured motorist benefits. In support of its argument appellee relies on Kraly v. Vannewkirk (1994), 69 Ohio St.3d 627, 635 N.E.2d 323.
In Kraly, the Kralys entered into a contract of insurance with State Farm Mutual Automobile Insurance Company (“State Farm”). The State Farm policy provided automobile liability insurance as well as uninsured/underinsured motorist coverage. The terms of the policy required that a claim for uninsured motorist coverage must be brought within two years of the date of an accident. The Kralys were injured in an automobile collision between their vehicle and a vehicle operated by an insured tortfeasor. However, shortly before the end of the contractual two-year period of limitations, the Kralys were notified that the tortfeasor’s automobile liability insurance carrier had become insolvent. The [286]*286Kralys sought to amend their cause of action against the tortfeasor to include a claim against State Farm for uninsured motorist coverage. Summary judgment was granted in favor of State Farm because the Kralys’ claim for uninsured motorist benefits was not commenced within two years of the date of the accident.
We held in Kraly that a contractual period of limitations is per se unreasonable if it expires before or shortly after the accrual of a right of action for uninsured motorist coverage. Id. at 635, 635 N.E.2d at 329. The court reasoned that the Kralys’ claim for uninsured motorist benefits did not accrue until they had been notified that the tortfeasor’s insurance company was insolvent. Since only three and one-half months remained before the end the contractual limitations period, the court determined that the period of time left for the Kralys to bring a claim for uninsured motorist coverage was unreasonable. Id. at 634, 635 N.E.2d at 328.
Kraly is clearly distinguishable from the case at bar. First, Kraly involved a claim for tminsured motorist coverage, while the present cause of action concerns claims for underinsured motorist benefits. The distinction between uninsured and underinsured motorist coverage is too obvious to require any explanation. Second, the situation in Kraly is very different from that in the cases now before us. The threshold issue in Kraly involved an interpretation of Civ.R. 15(C). A related issue concerned the validity of the contractual limitations period discussed above and whether or not that provision was reasonable or against public policy. The court in Kraly was not called upon to address the same issue we are called upon to decide herein.
In Kraly, the court determined that the “insolvency [of the tortfeasor’s liability insurance carrier] was the triggering event for uninsured motorist coverage.” Id. at 634, 635 N.E.2d at 328. The court analogized the situation in Kraly to those instances when a cause of action accrues upon the discovery of the alleged harm.2 The court reasoned that on the date of the accident, the tortfeasor was insured, and, thus, any claim for uninsured motorist benefits before the insolvency would not have been contemplated. Moreover, the court recognized that using the date of the accident as the accrual date for the Kralys’ uninsured motorist claim would [287]*287have been manifestly unfair given the date of the insolvency of the tortfeasor’s carrier because the Kralys’ time for filing such a claim was unreasonably brief, given the contractual limitations period. Id. at 633-634, 635 N.E.2d at 327-328.
We believe that the Montgomery County Court of Appeals was in error when it applied the holding of Kraly to appellants’ causes of action. Kraly unarguably involved a unique factual situation, and this court accordingly fashioned a remedy based upon concepts of fairness and public policy. In any event, Kraly should not be read to stand for the proposition that claimants’ rights to underinsured motorist coverage are contingent upon satisfaction of contractual preconditions to such coverage. An automobile liability insurance policy will typically require exhaustion of the proceeds of a tortfeasor’s policy before the right to payment of underinsured motorist benefits will occur. However, the date that exhaustion of the tortfeasor’s liability limits occurs is not determinative of the applicable law to a claim for underinsured motorist coverage.
II
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Douglas, J.
The question that has been certified for our consideration is as follows: “When does a cause of action for underinsured motorist coverage accrue so as to determine the law applicable to such a claim?” In the cases that are presently before us, the Montgomery County Court of Appeals held that Ross’s and Davis’s (hereinafter collectively “appellants”) rights to underinsured motorist coverage did not accrue until appellants had exhausted the tortfeasors’ available liability coverage. Because this condition precedent, i.e., settlement with the tortfeasor, occurred after the effective date of Am.Sub.S.B. No. 20, the court of appeals held that the version of R.C. 3937.18 that was enacted as part of Am.Sub. S.B. No. 20 controlled the determination whether appellants were entitled to [285]*285underinsured motorist coverage. In reaching this conclusion, the Montgomery County Court of Appeals found its holdings in Ross and Davis to be in conflict with the judgment of the Court of Appeals for the Fifth Appellate District in Brocwell and the judgment of the Court of Appeals for the Ninth Appellate District in McBee. In Brocwell and McBee, the appellate courts determined that the law in effect on the date of the accident controls the determination whether the insured is entitled to underinsured motorist coverage.
Considering the foregoing, and, further, that the date of the contract of insurance has also been presented by the parties for our consideration, we construe the issue before us to be a choice among date of contract, date of accident, and date of exhaustion in considering what, if any, effect subsequent legislation might have on the relationship between an insurer and its insured. For the reasons that follow, we find that the Montgomery County Court of Appeals erred in determining that the version of R.C. 3937.18 that was enacted as part of Am.Sub.S.B. No. 20 was the applicable law governing appellants’ claims for underinsured motorist coverage.
I
Appellee argues, and the Montgomery County Court of Appeals agreed, that an insured’s right to underinsured motorist benefits accrues when certain contractual preconditions to such coverage are met. According to appellee, the contractual preconditions of appellants’ automobile insurance policies required appellants to exhaust all applicable liability coverage before appellants could access their underinsured motorist coverage. Thus, appellee contends that appellants’ claims for underinsured motorist coverage did not accrue until they had settled with the tortfeasor, thereby exhausting the tortfeasor’s available liability coverage. Since that exhaustion did not occur until after Am.Sub.S.B. No. 20 went into effect, appellee asserts that, pursuant to the statutory law in effect, appellants were not entitled to underinsured motorist benefits. In support of its argument appellee relies on Kraly v. Vannewkirk (1994), 69 Ohio St.3d 627, 635 N.E.2d 323.
In Kraly, the Kralys entered into a contract of insurance with State Farm Mutual Automobile Insurance Company (“State Farm”). The State Farm policy provided automobile liability insurance as well as uninsured/underinsured motorist coverage. The terms of the policy required that a claim for uninsured motorist coverage must be brought within two years of the date of an accident. The Kralys were injured in an automobile collision between their vehicle and a vehicle operated by an insured tortfeasor. However, shortly before the end of the contractual two-year period of limitations, the Kralys were notified that the tortfeasor’s automobile liability insurance carrier had become insolvent. The [286]*286Kralys sought to amend their cause of action against the tortfeasor to include a claim against State Farm for uninsured motorist coverage. Summary judgment was granted in favor of State Farm because the Kralys’ claim for uninsured motorist benefits was not commenced within two years of the date of the accident.
We held in Kraly that a contractual period of limitations is per se unreasonable if it expires before or shortly after the accrual of a right of action for uninsured motorist coverage. Id. at 635, 635 N.E.2d at 329. The court reasoned that the Kralys’ claim for uninsured motorist benefits did not accrue until they had been notified that the tortfeasor’s insurance company was insolvent. Since only three and one-half months remained before the end the contractual limitations period, the court determined that the period of time left for the Kralys to bring a claim for uninsured motorist coverage was unreasonable. Id. at 634, 635 N.E.2d at 328.
Kraly is clearly distinguishable from the case at bar. First, Kraly involved a claim for tminsured motorist coverage, while the present cause of action concerns claims for underinsured motorist benefits. The distinction between uninsured and underinsured motorist coverage is too obvious to require any explanation. Second, the situation in Kraly is very different from that in the cases now before us. The threshold issue in Kraly involved an interpretation of Civ.R. 15(C). A related issue concerned the validity of the contractual limitations period discussed above and whether or not that provision was reasonable or against public policy. The court in Kraly was not called upon to address the same issue we are called upon to decide herein.
In Kraly, the court determined that the “insolvency [of the tortfeasor’s liability insurance carrier] was the triggering event for uninsured motorist coverage.” Id. at 634, 635 N.E.2d at 328. The court analogized the situation in Kraly to those instances when a cause of action accrues upon the discovery of the alleged harm.2 The court reasoned that on the date of the accident, the tortfeasor was insured, and, thus, any claim for uninsured motorist benefits before the insolvency would not have been contemplated. Moreover, the court recognized that using the date of the accident as the accrual date for the Kralys’ uninsured motorist claim would [287]*287have been manifestly unfair given the date of the insolvency of the tortfeasor’s carrier because the Kralys’ time for filing such a claim was unreasonably brief, given the contractual limitations period. Id. at 633-634, 635 N.E.2d at 327-328.
We believe that the Montgomery County Court of Appeals was in error when it applied the holding of Kraly to appellants’ causes of action. Kraly unarguably involved a unique factual situation, and this court accordingly fashioned a remedy based upon concepts of fairness and public policy. In any event, Kraly should not be read to stand for the proposition that claimants’ rights to underinsured motorist coverage are contingent upon satisfaction of contractual preconditions to such coverage. An automobile liability insurance policy will typically require exhaustion of the proceeds of a tortfeasor’s policy before the right to payment of underinsured motorist benefits will occur. However, the date that exhaustion of the tortfeasor’s liability limits occurs is not determinative of the applicable law to a claim for underinsured motorist coverage.
II
Appellants argue, in their first proposition of law, that the statutory law in effect at the time of entering into a contract of insurance controls the rights and duties of the contracting parties. Thus, according to appellants, when a contract for automobile liability insurance is entered into or renewed, the statutory law in effect at the time of contracting or renewal defines the scope of underinsured motorist coverage. We agree.
Appellants’ position on this issue is supported by a long line of decisions by this court. It is axiomatic that an insurance policy is a contract between the insurer and the insured. Ohio Farmers Ins. Co. v. Cochran (1922), 104 Ohio St. 427, 135 N.E. 537, paragraph one of the syllabus. The court stated in Goodale v. Fennell (1875), 27 Ohio St. 426, 432, that “[w]hen a contract is once made, the law then in force defines the duties and rights of the parties under it.” In Weil v. State (1889), 46 Ohio St. 450, 453, 21 N.E. 643, 644, quoting Smith v. Parsons (1823), 1 Ohio 236, 242, the court stated that “ ‘[contracts must be expounded according to the law in force at the time they were made; and the parties are as much bound by a provision contained in a law, as if that provision had been inserted in, and formed part of the contract.’ ”
Further, in Ady v. W. Am. Ins. Co. (1982), 69 Ohio St.2d 593, 23 O.O.3d 495, 433 N.E.2d 547, syllabus, the court held that “[a]ny contractual restriction on the coverage mandated by R.C. 3937.18 must comply with the purpose of this statute.” In Sexton v. State Farm Mut. Auto. Ins. Co. (1982), 69 Ohio St.2d 431, 433, 23 O.O.3d 385, 386, 433 N.E.2d 555, 558, the court noted that provisions of an automobile liability insurance policy that vary from statutory requirements are unenforceable. This court has also previously stated that “[w]hile R.C. 3937.18 [288]*288does not displace ordinary principles of contract law, a party cannot enter into contracts that are contrary to law.” Martin v. Midwestern Group Ins. Co. (1994), 70 Ohio St.3d 478, 480, 639 N.E.2d 438, 440, citing Hedrick v. Motorists Mut. Ins. Co. (1986), 22 Ohio St.3d 42, 51, 22 OBR 63, 71, 488 N.E.2d 840, 847 (A.W. Sweeney, J., dissenting). Based upon the foregoing it should be clear that the scope of coverage of an automobile liability insurance policy is defined by the statutory law in effect at the time of contracting.
Appellants’ position is further supported by Section 28, Article II of the Ohio Constitution, which provides that “[t]he general assembly shall have no power to pass * * * laws impairing the obligation of contracts.” A number of our cases, read singly or together, support the proposition that subsequent legislative enactments cannot alter the binding terms of a preexisting agreement entered into by contracting parties under the law as it existed at the time that the contract was formed.
For instance, we held in Aetna Life Ins. Co. v. Schilling (1993), 67 Ohio St.3d 164, 616 N.E.2d 893, syllabus, that a statutory provision applied to contracts that were entered into before the effective date of the statute would impair the obligation of contracts in violation of Section 28, Article II of the Ohio Constitution. We noted that if the statutory provision at issue in Schilling were applied to that case, “[it] would essentially change the contract which existed prior to the effective date of the statute.” Id. at 167, 616 N.E.2d at 895. Moreover, in Burtner-Morgan-Stephens Co. v. Wilson (1992), 63 Ohio St.3d 257, 586 N.E.2d 1062, syllabus, a unanimous court reached a similar conclusion when it held that, pursuant to Section 28, Article II of the Ohio Constitution, a statute could not be retroactively applied to determine the distribution of royalties that were provided for in an agreement entered into prior to the enactment of the statute. In Kiser v. Coleman (1986), 28 Ohio St.3d 259, 28 OBR 337, 503 N.E.2d 753, syllabus, a majority of this court held that the retroactive application'of statutory provisions to land installment contracts that were in existence at the time of the enactment of the statutes violated Section 28, Article II of the Ohio Constitution by impairing an obligation of contract.
In the cases before us, each of the contracts was entered into before the enactment of Am.Sub.S.B. No. 20 on October 20, 1994. In fact, both policies expired well before the effective date of Am.Sub.S.B. No. 20. Appellee does not dispute that appellants had in effect at the time of their accidents valid and enforceable policies of automobile liability insurance with the appellee that included provision for underinsured motorist coverage. In Benson v. Rosler (1985), 19 Ohio St.3d 41, 19 OBR 35, 482 N.E.2d 599, a majority of this court stated that “[statutes pertaining to a policy of insurance and its coverage, which are enacted after the policy’s issuance, are incorporated into any renewal of such [289]*289policy if the renewal represents a new contract of insurance separate from the initial policy.” Id. at 44, 19 OBR at 37, 482 N.E.2d„at 602, citing 12 Appleman, Insurance Law and Practice (1981) 166, Section 7041. In other words, the only instances in which Am.Sub.S.B. No. 20 could have been incorporated into the appellants’ policies of insurance with appellee without impairing the obligation of contract would have been if a new contract of insurance had been entered into, or a renewal (representing a new contract of insurance) of the existing policy had occurred. Neither situation occurred in the instant matters.
As indicated in our discussion infra, the statutory law in effect at the time that the parties entered into their respective insurance contracts was former R.C. 3937.18, as interpreted by Savoie. The version of R.C. 3937.18 that was enacted as part of Am.Sub.S.B. No. 20 on October 20,1994, was intended to supersede the effect of our holding in Savoie. See Section 7 of Am.Sub.S.B. No. 20 (145 Ohio Laws, Part I, 238). Were we to accept appellee’s argument that Am.Sub.S.B. No. 20 is the controlling law regarding the appellants’ underinsured motorist claims, we would be permitting a subsequent legislative enactment to intervene and change the law and coverage contracted for in policies that were in effect at the time of the accidents. That result would permit Am.Sub.S.B. No. 20 to abrogate the terms (coverages) of an insurance contract that was agreed to, entered into, and paid for before the date that the legislation became effective. This we decline to do.
Accordingly, we hold that for the purpose of determining the scope of coverage of an underinsured motorist claim, the statutory law in effect at the time of entering into a contract for automobile liability insurance controls the rights and duties of the contracting parties.
Ill
Since we have concluded that the statutory law in effect at the time of contracting defines the scope of underinsured motorist coverage, we must now determine whether appellants are entitled to underinsured motorist benefits pursuant to the law applicable to their underinsured motorist claims. Olivea Ross’s accident occurred on April 23, 1993. At that time, she had an automobile liability insurance policy with appellee that was in effect for the period of time from March 1, 1993 through noon, September 1, 1993. David Davis’s accident occurred on May 14, 1993. His policy with appellee was effective for a six-month period beginning February 1,1993 and ending noon, August 1,1993. At the time of each accident, the decisional law governing an underinsured motorist claim was set forth in Hill v. Allstate Ins. Co. (1990), 50 Ohio St.3d 243, 553 N.E.2d 658, syllabus. In Hill the court held:
[290]*290“Unless otherwise provided by an insurer, underinsured motorist liability insurance coverage is not ‘available to an insured where the limits of liability contained in the insured’s policy are identical to the limits of liability set forth in the tortfeasor’s liability insurance coverage. (R.C. 3937.18[A][2], construed and applied; Wood v. Shepard [1988], 38 Ohio St.3d 86, 526 N.E.2d 1089, distinguished and explained.).”
Clearly, under the decisional law at the time of the accidents as set forth in Hill, appellants would not be entitled to underinsured motorist coverage. However, on October 1, 1993, this court announced its decision in Savoie v. Grange Mut. Ins. Co. (1993), 67 Ohio St.3d 500, 620 N.E.2d 809. Savoie interpreted former R.C. 3937.18 and represented a substantial change in the law affecting issues of liability coverage and uninsured/underinsured motorist coverage. In Savoie, we held, at paragraph three of the syllabus:
“An underinsured claim must be paid when the individual covered by an uninsured/underinsured policy suffers damages that exceed those monies available to be paid by the tortfeasor’s liability carriers. (Hill v. Allstate Ins. Co. [1990], 50 Ohio St.3d 243, 553 N.E.2d 658, overruled.)”
In Peerless Elec. Co. v. Bowers (1955), 164 Ohio St. 209, 210, 57 O.O. 411, 129 N.E.2d 467, 468, this court set forth the following general rule concerning the retroactivity of our decisions overruling prior decisions: “The general rule is that a decision of a court of supreme jurisdiction overruling a former decision is retrospective in its operation, and the effect is not that the former was bad law, but that it never was the law.” Thus, given the application of the Peerless doctrine, at the time of appellants’ automobile accidents when appellants were insured against loss under the terms of their automobile liability insurance policies with appellee, Savoie was the controlling decisional law. Therefore the law applicable to their respective causes of action is former R.C. 3937.18 as interpreted by Savoie. Pursuant to the law set forth in former R.C. 3937.18 and Savoie, appellants are entitled to receive underinsured motorist benefits from appellee.
Conclusion
Accordingly, we reverse the judgments of the court of appeals and remand these causes for reinstatement of the trial courts’ decisions.
Judgments reversed and causes remanded.
Resnick, F.E. Sweeney and Pfeifer, JJ., concur.
Moyer, C.J., dissents.
[291]*291Cook and Lundberg Stratton, JJ., separately dissent.