Corrigan, J.
This case concerns the validity of rules promulgated by defendant Commissioner of Financial & Insurance Services (the OFIS rules)1 banning the practice of “insurance scoring” under Chapters 21, 24, and 26 of the Insurance Code. The trial court ruled that the rules were “illegal, invalid, and unenforceable” and permanently enjoined defendant from enforcing them. The Court of Appeals issued three separate opinions, which vacated the circuit court’s order but did not agree on a rationale. We hold that the Commissioner exceeded her authority by promulgating the OFIS rules because they are contrary to the Insurance Code. Accordingly, we vacate the judgment of the Court of Appeals and reinstate the trial court’s order.
I. FACTS AND PROCEEDINGS
As explained in a 2002 report from then-OFIS Commissioner Frank Fitzgerald, “insurance scoring” or [375]*375“insurance credit scoring” is “the use of select credit information to help insurance companies establish automobile and homeowners premiums.” Frank Fitzgerald, The Use of Credit Scoring in Automobile and Homeowners Insurance (2002) (Fitzgerald Report),2 p 5. An individual’s credit score is calculated by applying a standard formula to information from the individual’s credit history. These formulas are developed either by the insurance companies themselves or by credit scoring companies. Id. Insurance companies that use insurance scoring offer discounts to individuals with good insurance scores. Not all insurance companies use insurance scoring. Of those that do, their practices vary concerning the extent of the discounts offered and how the insurance scores are calculated. Id. at 5-6.
In 1997, the Legislature enacted MCL 500.2110a, which allows insurers to establish and maintain a premium discount plan without prior approval by the Legislature or the insurance commissioner. As a result, insurance companies in Michigan began using insurance scoring. Fitzgerald Report, supra at 9. In 2002, Commissioner Fitzgerald undertook a statewide study of this practice in order “to gather information on the use of insurance credit scoring in personal automobile and homeowners insurance policies and to take testimony concerning its effect on Michigan citizens.” Id. at 1. In December 2002, OFIS issued the Fitzgerald Report, which concluded that “Michigan law permits a discount based on insurance credit scoring” but that “significant and legitimate concerns” identified during the course of the study “must be addressed to adequately protect the rights of Michigan consumers [376]*376under the Insurance Code.” Id. at 24. To address these concerns, the report included several “Administrative Recommendations,” or “áction[s] that [are] available to the commissioner under current law.” Id. The report concluded that “[o]ther concerns are beyond the statutory authority of the commissioner to remedy and will require action by the Michigan Legislature.” Id. The report thus “respectfully submitted” several “Legislative Recommendations” “for the consideration of legislators in their policy deliberations.” Id. None of the legislative recommendations totally prohibited the use of insurance scoring.
On February 14, 2003, Commissioner Fitzgerald issued a bulletin setting forth several directives taken from the December 2002 report. In the Matter of Conforming Insurance Credit Scoring Practices With Insurance Code Requirements, OFIS Bulletin 2003-01-INS (February 14, 2003).3 On the same date, he issued an order directing OFIS staff to monitor insurance companies’ compliance with the directives and to initiate compliance actions as appropriate. Order to Monitor Insurer Practices and To Initiate Compliance Actions as Appropriate, OFIS Order No. 03-005-M (February 14, 2003).4 The bulletin directed insurance companies using insurance scoring to file with OFIS such information as “the formula used to apply the discount,” “the specific credit classification factors used to calculate the insurance credit score,” and an annual “actuarial certification justifying the discount levels and discount tiers offered by the company.” OFIS Bulletin, supra. The bulletin also directed insurance companies to “re[377]*377calculate and then apply an insured’s insurance credit score at least once annually” and to “annually inform . .. policyholders or applicants of the credit score used to apply an insurance credit scoring discount. . . Id.
On May 13, 2003, then-OFIS Commissioner Linda A. Watters5 issued an “update” to her predecessor’s February 14, 2003 bulletin. In the Matter of Insurance Credit Scoring Practices — Update to Bulletin 2003-01-INS, OFIS Bulletin 2003-02-INS (May 13, 2003) (Watters Bulletin).6 The bulletin began by stating that “[insurance scoring is problematic at best. Perhaps no other widespread practice of insurers presents so many technical and social issues.” After providing several examples, the bulletin continued: [378]*378The bulletin also reiterated that insurers must inform policyholders or applicants of the credit score used to apply a discount and revised the directive requiring annual recalculation of insurance scores to require recalculation only upon the request of the insured. Id.
[377]*377Such considerations led Governor Granholm to call for a ban on the use of insurance credit scoring altogether. In February, two bills were introduced that would ban the use of insurance credit scoring in the rating of automobile and home insurance....
If a ban cannot be achieved, at least significant reform legislation is imperative to protect the interests of consumers on such an important matter as the amount they pay for automobile and home insurance. This agency will be fully supportive of the Governor in these matters.
In the meantime, it is incumbent upon the Commissioner to make the most of current law in addressing the concerns above. Bulletin 2003-01-INS was designed to conform insurance credit scoring practices to Insurance Code requirements.
[378]*378In July 2004, after neither of the above-mentioned bills was enacted into law, OFIS developed proposed administrative rules prohibiting the use of insurance scoring. It held four public hearings — in Lansing, Detroit, Grand Rapids, and Flint — “to receive public comments on proposed rules clarifying a reasonable classification system under the Insurance Code, by requiring insurers to adjust base rates and by prohibiting the use as a rating factor after January 1, 2005, of a credit-based insurance score.” See OFIS Notice of Public Hearing on Proposed Rules to Reduce Insurance Base Rates and To Ban the Use of Credit Scoring.7
After submission to and approval by the Office of Regulatory Reform,8 the Commissioner formally adopted the rules. See MCL 24.245. On February 17, 2005, the Joint Committee on Administrative Rules (JCAR)9 issued a notice of objection to the proposed rules. See MCL 24.245a.10 JCAR determined that “[t]he agency is exceeding the statutory scope of its rule-[379]*379making authority” and that “[t]he rule is in conflict with state law, the Insurance Code of 1956,” and “is arbitrary or capricious.” JCAR Revised Notice of Objection, # 05-3 (February 17, 2005). Bills to rescind the OFIS rules upon their effective date were introduced in both the House and Senate on February 22, 2005. SB 233; HB 4374. See MCL 24.245a(3).11 After Governor Granholm indicated her intention to veto these bills, however, Senator Mike Bishop stated during a March 9, 2005 session of the Senate that “it would be futile for us to take up these bills and pointless to pursue passage of Senate Bill No. 233.” Statement of Senator Bishop, Journal of the Senate, March 9, 2005, pp 247-248. No legislative action ensued.
Under MCL 24.245a(5),12 ORR filed the rules with the Secretary of State on March 25, 2005. On March 29, 2005, plaintiffs filed a complaint for declaratory and injunctive relief, and the Michigan Insurance Coalition and Citizens Insurance Company of America filed a [380]*380complaint and a motion to intervene as plaintiffs.13 Plaintiffs and proposed intervening plaintiffs also sought a preliminary injunction. The parties subsequently stipulated to the intervention of the proposed intervening plaintiffs as plaintiffs.
Defendant moved for. a change of venue and also argued that plaintiffs were not permitted to bring an original action in the circuit court, but were limited to filing a petition for judicial review under MCL 500.244(1). On April 15, 2005, the trial court heard arguments on both defendant’s motion and on the merits of the case. It denied defendant’s motion for a change of venue. At the close of plaintiffs’ arguments on the merits, defense counsel declined to present any additional testimony or evidence, stating the defense position that review should be limited to the administrative record.14 The court then stated it would “consolidate this hearing with the final trial.”
[381]*381In its opinion and order issued April 25, 2005, the trial court concluded that the OFIS rules were “illegal, invalid, and unenforceable,” and permanently enjoined the Commissioner from enforcing them. The court “decline[d] to review the record of the public hearings for the reason that it consists largely of position statements and opinions which may not be admissible under the rules of evidence, and more importantly because the [c]ourt [found] it unnecessary to address whether the rules are arbitrary and capricious ....” Id. at 3. Rather, it viewed the dispositive issue as “the legality of the Defendant’s rules, given the Commissioner’s rule-making authority.” Id. It concluded that the Commissioner had exceeded her authority in promulgating the rules by ordering an industry-wide reduction in rates rather than challenging rates on an individual basis through the contested case hearing process set forth in the Insurance Code. Id. at 4. The court also concluded that the rules’ “blanket prohibition” on rating plans using insurance scoring violated the Insurance Code because the evidence established a correlation between insurance scores and risk of loss, and the Commissioner lacks the authority to ban rating plans that meet the requirements of the Code. Id. at 5.
[382]*382Defendant appealed. On August 21, 2008, the Court of Appeals issued three separate opinions. Ins Institute of Mich v Comm’r of the Office of Fin & Ins Servs, 280 Mich App 333; 761 NW2d 184 (2008). Judge WHITE voted to vacate the trial court’s judgment in part because the court had erred by failing to base its review on the administrative record, by accepting additional evidence, and in part on the merits. Id. at 343-365. Judge K. F. KELLY also thought that the trial court’s order should be vacated, but for a different reason: namely, because the court had erred by permitting plaintiffs to maintain an original action. Id. at 379-382. Judge ZAHRA dissented from the decision to vacate the trial court’s order. He concluded that the court had properly allowed plaintiffs to bring an original action. Id. at 366-372. Although he agreed with Judge WHITE that the court had erred by failing to base its review on the administrative record, he concluded that the error was harmless “because the issue resolved by the lower court was a purely legal question[.]” Id. at 366. Judge ZAHRA agreed with the trial court that the rules were illegal and invalid because the Commissioner exceeded her authority in promulgating them. Id. at 373-379.
In February 2009, despite pending applications for leave to appeal in this Court, defendant began issuing notices that disapproved new rate filings. At least some of the notices acknowledged the trial court’s order enjoining enforcement of the OFIS rules, but they stated that the Commissioner’s disapproval of the particular rate filing was “based on the conclusion that insurance scoring is directly prohibited by the Insurance Code because rates based on insurance scoring are unfairly discriminatory and not in reliance on the enjoined administrative rules.” As a result of the Commissioner’s issuance of these notices, plaintiffs moved in the trial court to enforce the court’s April 25, 2005 [383]*383order. On April 10, 2009, the court issued an order granting plaintiffs’ motion and precluding defendant from “challenging or denying rate filings on the basis that the rate filing uses insurance scores as a rating factor.” The order further provided that defendant’s notices were “VOID and RESCINDED as violative of this Court’s prior injunction” and ordered the Commissioner to “REFRAIN from taking further action based on a blanket prohibition on the use of insurance scores.”
Both parties filed applications for leave to appeal. By order of May 7, 2009, we granted leave to resolve the various procedural and substantive issues in this case. Ins Institute of Mich v Comm’r Fin & Ins Servs, 483 Mich 1000 (2009).
II. JUDICIAL REVIEW OF AGENCY RULEMAKING
The first set of issues before us concerns defendant’s claim that the trial court erred by permitting plaintiffs to maintain an original declaratory judgment action. Defendant argues that, under § 64 of the Administrative Procedures Act (APA), MCL 24.201 et seq., plaintiffs were not permitted to bring an original declaratory judgment action in the trial court without having first requested a declaratory ruling from the OFIS. Defendant also argues that MCL 500.244(1) provides the exclusive means of seeking judicial review of rules promulgated by the Commissioner and that, under that provision, as well as this Court’s decision in Mich Ass’n of Home Builders v Dep’t of Labor & Economic Growth Dir, 481 Mich 496; 750 NW2d 593 (2008), judicial review of administrative rules is limited to the “administrative record,” i.e., the record compiled during the rulemaking process.
[384]*384We decline to reach these issues because it is unnecessary for us to do so. Defendant has expressly waived any error concerning the procedural issues by arguing that a remand to the trial court is unnecessary and asking this Court to reach the substantive issues in this case.15 Moreover, even if the trial court erred by not limiting its review to the administrative record, the error was harmless because there is ample evidence in that record to support the trial court’s conclusion that insurance scoring is permissible under the Insurance Code.16
III. VALIDITY OF THE RULES UNDER THE INSURANCE CODE
A. STANDARD OF REVIEW
This case presents the legal question of the validity of the OFIS rules under the Insurance Code. In Luttrell v Dep’t of Corrections, 421 Mich 93, 100; 365 NW2d 74 [385]*385(1984), we adopted the test for judicial review of agency rules articulated by the Court of Appeals in Chesapeake & Ohio R Co v Pub Serv Comm, 59 Mich App 88, 98-99; 228 NW2d 843 (1975):
“Where an agency is empowered to make rules, courts employ a three-fold test to determine the validity of the rules it promulgates: (1) whether the rule is within the matter covered by the enabling statute; (2) if so, whether it complies with the underlying legislative intent; and (3) if it meets the first two requirements, when [sic] it is neither arbitrary nor capricious.”
An agency’s construction of a statute “is entitled to respectful consideration and, if persuasive, should not be overruled without cogent reasons,” but “the court’s ultimate concern is a proper construction of the plain language of the statute.” In re Complaint of Rovas Against SBC Mich, 482 Mich 90, 108; 754 NW2d 259 (2008). “[T]he agency’s interpretation cannot conflict with the plain meaning of the statute.” Id.
As discussed in part III(D) of this opinion, we conclude that the Commissioner exceeded her authority in promulgating the OFIS rules. The rules purport to prohibit a practice — insurance scoring — that is permissible under the Insurance Code. Accordingly, the OFIS rules are not “within the matter covered by the enabling statute.” Luttrell, 421 Mich at 100 (citation and quotation marks omitted).17
[386]*386B. THE INSURANCE CODE
The OFIS rules apply to “personal insurance,” which they define as “private passenger automobile, homeowners, motorcycle, boat, personal watercraft, snowmobile, recreational vehicle, mobile-homeowners and noncommercial dwelling fire insurance policies” that are “underwritten on an individual or group basis for personal, family, or household use.” Mich Admin Code, R 500.2151(2).
Accordingly, three chapters of the Insurance Code are relevant here: Chapter 21, which applies to individual automobile and home insurance; Chapter 24, which applies to group automobile and home insurance as well as personal lines covering mobile homes, rental properties, recreational vehicles, motorcycles, and boats; and Chapter 26, which applies to group home insurance and the other personal property lines to which Chapter 24 also applies. MCL 500.2105; MCL 500.2401; MCL 500.2601; OFIS Report to JCAR (October 1, 2004), p 2.
Under all three chapters, the insurers, rather than the Commissioner or OFIS, formulate the plans they use to establish insurance rates. In formulating rating plans under Chapters 24 and 26, “[d]ue consideration shall be given to past and prospective loss experience... and to all other relevant factors within and outside this state.” MCL 500.2403(l)(a); MCL 500.2603(l)(a). “Risks may be grouped by classifications for the establishment of rates and minimum premiums,” and “[t]he rating plans may measure any differences among risks that may have a probable effect upon losses or expenses....” MCL 500.2403(l)(c); MCL 500.2603(l)(c). “Rates shall not be excessive, inadequate, or unfairly discriminatory.” MCL 500.2403(d); MCL 500.2603(d).
For home and automobile insurance under Chapter 21, classifications must be “based only upon 1 or more” [387]*387of the factors set forth in MCL 500.2111. MCL 500.2111(2). These factors include such things as the age of the driver, average weekly or annual mileage, and amount of insurance. In addition, MCL 500.2110a permits insurers to “establish and maintain a premium discount plan utilizing factors in addition to those permitted by section 2111,” provided that “the plan is consistent with the purposes of this act and reflects reasonably anticipated reductions in losses or expenses” and the insurer applies the plan uniformly to all its insureds. Rates under Chapter 21, like those established under Chapters 24 and 26, “shall not be excessive, inadequate, or unfairly discriminatory.” MCL 500.2109(l)(a).
The Commissioner derives her rulemaking authority from MCL 500.210, which provides:
The commissioner shall promulgate rules and regulations in addition to those now specifically provided for by statute as he may deem necessary to effectuate the purposes and to execute and enforce the provisions of the insurance laws of this state in accordance with the provisions of [the APA].[18]
In addition, MCL 500.2484 (Chapter 24) and MCL 500.2674 (Chapter 26) provide: “The commissioner may make reasonable rules and regulations necessary to effect the purposes of this chapter.”
C. THE OFIS RULES
The OFIS rules on insurance scoring, Mich Admin Code, R 500.2151 through 500.2155, provide:
Rule 1. As used in these rules:
(1) “Insurance score” means a number, rating, or grouping of risks that is based in whole or in part on credit [388]*388information for the purposes of predicting the future loss exposure of an individual applicant or insured.
(2) “Personal insurance” means private passenger automobile, homeowners, motorcycle, boat, personal watercraft, snowmobile, recreational vehicle, mobile-homeowners and non-commercial dwelling fire insurance policies. “Personal insurance” only includes policies underwritten on an individual or group basis for personal, family, or household use. [Mich Admin Code, R 500.2151.]
Rule 2. These rules apply to personal insurance. [Mich Admin Code, R 500.2152.]
Rule 3.
(1) For new or renewal policies effective on and after July 1, 2005, an insurer in the conduct of its business or activities shall not use an insurance score as a rating factor.
(2) For new and renewal policies effective on and after July 1, 2005, an insurer in the conduct of its business or activities shall not use an insurance score as a basis to refuse to insure, refuse to continue to insure, or limit coverage available. [Mich Admin Code, R 500.2153.]
Rule 4.
(1) For new and renewal policies effective on or after July 1, 2005, an insurer shall adjust base rates in the following manner:
(a) Calculate the sum of earned premium at current rate level for the period January 1, 2004 through December 31, 2004.
(b) Calculate the sum of earned premium at current rate level with all insurance score discounts eliminated for the period January 1, 2004 through December 31, 2004.
(c) Reduce base rates by the factor created from the difference of the number 1 and the ratio of the amount of subdivision (a) to the amount of subdivision (b).
(2) The insurer shall file with the commissioner a certification that it has made the base rate adjustment and documentation describing the calculation of the base rates [389]*389adjustment. The insurer shall file the certificate and documentation not later than May 1, 2005. [Mich Admin Code, R 500.2154.]
Rule 5. If an insurer fails to make the filing required under R 500.2154, in any proceeding challenging a related rate filing, then the insurer shall be subject to the presumption that the rate filing does not conform to rate standards. [Mich Admin Code, R 500.2155.]
D. ANALYSIS
i. INTRODUCTION
We conclude that the trial court properly held the OFIS rules invalid and unenforceable. Plaintiffs have demonstrated that the OFIS rules are not “within the matter covered by the enabling statute” as required by Luttrell, 421 Mich at 100, because insurance scoring is permissible under the Insurance Code. The record supports plaintiffs’ contention that insurance scoring may be used to establish a premium discount plan under Chapter 21. Insurance scores may also be used as a rating factor under Chapters 24 and 26, and defendant has failed to show that insurance scoring produces rates that are “unfairly discriminatory.” The Commissioner has the authority to “promulgate rules and regulations” to “effectuate the purposes” of the Insurance Code and to “execute and enforce” its provisions. MCL 500.210. By enacting a total ban on insurance scoring, a practice that may be employed in a manner that is consistent with the Insurance Code, defendant exceeded her authority as the OFIS Commissioner.19
[390]*390ii. INSURANCE SCORING MAY BE USED TO ESTABLISH A PREMIUM DISCOUNT PLAN
Chapter 21 of the Insurance Code, MCL 500.2110a,20 permits insurers to establish and maintain a premium discount plan using factors in addition to those specifically enumerated in MCL 500.2111, provided that the plan “is consistent with the purposes of this act and reflects reasonably anticipated reductions in losses or expenses” and is uniformly applied to all the insurer’s insureds.
The evidence establishes that a premium discount plan using insurance scoring may reflect reasonably anticipated reductions in losses or expenses on the part of the insurer employing the plan. Commissioner Fitzgerald’s 2002 report concluded that
[t]here exists a correlation between a person’s insurance credit score and the likelihood that a claim will be filed. A thorough review of material submitted by ChoicePoint and by a number of companies demonstrates that better scores are connected to fewer claims and thus lower expenses than are the scores of persons with weaker credit histories. [Fitzgerald Report, supra at 22.]
In addition, several affidavits submitted by plaintiffs in the lower court record indicate a correlation between insurance scores and risk of loss. The affidavit of Morrall Claramunt, Executive Vice President and Secretary of plaintiff Frankenmuth Mutual Insurance [391]*391Company, is representative. Claramunt stated in his affidavit that “Frankenmuth’s experience shows that there is a clear and direct correlation between insurance scores and risk. Among our insureds, people with higher insurance scores are better risks.” Claramunt stated that 91 percent of Frankenmuth’s homeowners insurance customers and 89 percent of its automobile insurance customers receive insurance score discounts on their premiums. He estimated that 68.1 percent of Frankenmuth’s homeowners insurance customers and 43.5 percent of its automobile insurance customers would experience premium increases as a result of the OFIS rules’ ban on insurance scoring. Claramunt stated that “[t]hese premiums do not reflect a shift in corresponding risk of loss, but result in low-risk insureds subsidizing the insurance rates of high-risk insureds.” Proposed Intervenors’ Appendix to Brief in Support of Motion for Preliminary Injunction, March 29, 2005, included in Plaintiffs Appendix in Docket No. 137407, p 116a. Affidavits of representatives of plaintiffs Farm Bureau Insurance Company, Progressive Michigan Insurance Company, Hastings Mutual Insurance Company, and Citizens Insurance Company of America similarly stated that those companies’ experiences show a correlation between insurance scores and risk, and that the OFIS rules would result in lower-risk insureds subsidizing the rates of higher-risk insureds. See id. at 115a-152a.
Evidence in the administrative record also supports the conclusion that there is a correlation between insurance scores and risk of loss. For example, according to a statement submitted by Allstate Insurance Company, “the use of credit information is the most powerful predictor of losses to be developed in the past 30 years.” Plaintiffs’ Appendix in Docket No. 137400, p 200b. A chart submitted by Allstate Insurance Com[392]*392pany based on Michigan data demonstrates that “insureds . . . that have superior insurance scores have [a] corresponding superior loss cost experience,” and that insureds with the lowest insurance scores have “over 50% more claims paid” than insureds with the highest insurance scores. Id. at 203b. In addition, Michigan data submitted by Farm Bureau Insurance of Michigan “clearly suggests that, as a group, insureds with better insurance scores have better loss experience.” Id. at 98b. The personal auto product manager for Progressive Michigan Insurance Company testified that “[o]ur data shows that credit information is highly predictive of loss . ...” Id. at 105b. A comprehensive study conducted by EPIC Actuaries, LLC, concluded that “the propensity for loss decreases as [the] insurance score increases.” Id. at 59b. Finally, the Virginia Bureau of Insurance Study concluded that “there is a concrete statistical correlation between insurance scores based on credit bureau data and the likelihood of an individual filing an insurance claim.” Id. at 132b.21
[393]*393Defendant acknowledges that “there is no dispute that [MCL 500.2110a] authorizes a premium discount plan based on factors that correlate to expected reductions in losses or expenses. For example, discounts may be based on maintaining fire extinguishers in the home [394]*394because it is expected that the presence of fire extinguishers will be associated with reduced losses.” Defendant’s Brief in Docket No. 137400, p 18. Defendant argues, however, that MCL 500.2110a does not permit a premium discount plan using insurance scoring “because insurance scoring is not associated with anticipated reductions in overall losses. In other words, insurers do not expect their overall losses to change whether or not they have an insurance-scoring discount plan.” Id. (emphasis omitted). In support of this conclusion, defendant states that “insurers admitted” at the public hearings and as part of the public comment process “that doing away with insurance scoring would not change overall premiums.” Id. Defendant quotes testimony from a spokesperson for State Farm Insurance Company: “Insurance scoring does not change the total amount of premium collected by the insurance companies and a ban of its use will not change the total amount either.” Id. at 19.
From insurers’ testimony that the OFIS rules banning insurance scoring would not result in an industry-wide reduction in premiums for insurance consumers,22 defendant argues that insurers do not expect a reduction in “overall losses” to be associated with offering discounts for insurance scores. Defendant’s argument [395]*395misreads MCL 500.2110a, which says nothing about overall losses or expenses. MCL 500.2110a allows “an insurer” to establish “a plan” “if the plan . .. reflects reasonably anticipated reductions in losses or expenses.” The plain meaning of this provision is that an insurer may establish a plan that it reasonably anticipates will reduce its own losses or expenses. It is unclear how an insurer would “reasonably anticipateG” the effect of its premium discount plan on industry-wide losses or expenses.23 Individual insurers do, of course, anticipate reductions in their own losses or expenses to result from the use of premium discount plans using insurance scoring. Specifically, they anticipate that insurance score discounts will enable them to attract and retain more low-risk customers by offering these customers lower rates. Plaintiffs have demonstrated a clear correlation between insurance scores and risk of loss, as already discussed. Therefore, they have established that a discount plan that enables an insurer to attract and retain more lower risk insureds “reflects reasonably anticipated reductions in losses or expenses for that insurer.”24
[396]*396Defendant’s attempts to distinguish the use of insurance scores to establish a premium discount plan from the use of safety devices to establish such a plan fails to acknowledge that MCL 500.2111 already permits insurers to take into account “[s]ecurity and safety devices,” including “smoke detectors” and “similar, related devices.” MCL 500.2111(7)(b). Similarly, for automobile insurance, the statute permits “[u]se of a safety belt” to be used as a classification factor. MCL 500.21112(b)(ic). The Legislature added MCL 500.2110a in 1997 to permit insurers to offer discounts on the basis of factors “in addition to those permitted by” MCL 500.2111. Defendant’s effort to distinguish discounts for safety devices from discounts for higher insurance scores also fails to recognize that offering discounts for high insurance scores, like offering discounts for safety devices, allows insurers to attract insureds who present less risk (because they currently have safety devices or high insurance scores), and may provide future incentives for insureds to acquire safety devices or improve their insurance scores, and thus become statistically less risky customers. There is little difference between providing a discount for anti-lock brakes, for example, and providing a discount based on high insurance scores.25 [397]*397Discounts for anti-lock brakes are offered because they reduce the risk of loss, and discounts for high insurance scores are offered because they reduce the risk of loss. The more insureds there are with anti-lock brakes, the lower the risk of overall loss. Likewise, the more insureds there are with high insurance scores, the lower the risk of overall loss.
Defendant also argues that a premium discount plan using insurance scoring is impermissible under MCL 500.2110a because it ignores one of the express purposes of the Insurance Code: to make insurance available and affordable for everyone.26 Defendant contends [398]*398that, unless a premium discount plan reduces overall losses and reduces premiums for some policyholders without a corresponding increase in premiums for others industry-wide, it is inconsistent with the Legislature’s purpose of making insurance available and affordable for everyone. These assertions about the overarching purposes of the insurance code are unavailing because, as discussed above, MCL 500.2110a expressly permits “an insurer” to establish “a plan” “if the plan . . . reflects reasonably anticipated reductions in losses or expenses.”
Moreover, in his 2002 report, Commissioner Fitzgerald concluded that “insurance credit scoring contributes to the continued availability and affordability of automobile and homeowners insurance.” Fitzgerald Report, supra at 17. There is also evidence in the administrative record that the majority of Michigan residents will see an increase in their insurance premiums if insurance scoring is prohibited. See Plaintiffs’ Appendix in Docket No. 137400 at 98b, 106b, 169b, 194b, and 204b. If so, the prohibition of insurance scoring would obviously make insurance less affordable for many Michigan policyholders. The availability of insurance would be diminished because insurers would no longer be able to use “the most powerful predictor of losses” to determine rates. Id. at 200b. A number of insurers submitted testimony indicating that competition in Michigan would likely decrease because of the increased risks associated with a less sophisticated and precise classification structure, thereby decreasing the availability of insurance. Id. at 100b and 177b. For example, one insurer opined:
If Michigan joins the distinct minority of states rejecting [insurance scoring] and depriving carriers of this highly predictive rating tool, [we] fear[] that many national carriers will decline to write in this state. Declining carrier [399]*399presence will translate to fewer options for consumers and ultimately, higher rates. [Id. at 177b.]
The Federal Trade Commission (FTC) also explained in a report to Congress that using insurance scoring is of broad benefit:
Insurance companies have a strong economic incentive to try to predict risk as accurately as possible. In a competitive market for insurance in which all firms have access to the same information about risk, competition for customers will force insurance companies to offer the lowest rates that cover the expected cost of each policy sold. If an insurance company is able to predict risk better than its competitors, it can identify consumers who currently are paying more than they should based on the risk they pose, and target those consumers by offering them a slightly lower price. Thus, developing and using better risk prediction methods is an important form of competition among insurance companies.[27]
It seems unlikely that more available and more affordable insurance will result from decreased competition among insurers any more than such a market phenomenon would likely result in the increased availability or affordability of any other product or service. That is, it is the prohibition, not the allowance, of insurance scoring that will, in fact, make insurance both less available and less affordable to Michigan residents. It is noteworthy in this regard that after the Maryland legislature banned the use of insurance scoring for homeowners insurance, rates increased as much as 20 percent for homeowner policyholders, and at least one [400]*400insurer indicated that about 75 percent of its homeowner policyholders incurred rate increases.28
Even defendant does not appear to dispute that while banning insurance scoring would lower insurance premiums for insurance customers with lower credit scores, it would raise premiums for many others with higher insurance scores who are now receiving discounts on the basis of those scores. It is difficult to see how offering discounts to some insureds on the basis of good insurance scores is inconsistent with the Insurance Code’s general purpose of availability and affordability of insurance for all consumers. Defendant has not shown that insurance scoring cannot be used to establish a premium discount plan that complies with MCL 500.2110a.
iii. INSURANCE SCORING DOES NOT PRODUCE RATES THAT ARE UNFAIRLY DISCRIMINATORY
For the reasons explained above, insurance scoring may be used to establish a premium discount plan under Chapter 21. For insurance under Chapters 24 and 26, insurers must give due consideration to “past and prospective loss experience” and “all other relevant factors....” MCL 500.2403(l)(a); MCL 500.2603(l)(a). “Risks may be grouped by classifications for the establishment of rates and minimum premiums,” and “rating plans may measure any differences among risks that may have a probable effect upon losses or expenses ....” MCL 500.2403(l)(c); MCL 500.2603(l)(c). “Rates shall not be excessive, inadequate, or unfairly discriminatory.” MCL 500.2403(l)(d); MCL 500.2603(l)(d).
Thus, under Chapters 24 and 26, insurers may generally establish any rating plan that “measures any differ[401]*401enees among risks that may have a probable effect upon losses or expenses.” As discussed above, the experience of the insurance industry, as established in the lower court record, demonstrates a correlation between insurance scores and risk of loss. Thus, just as insurance scoring may be used to establish a premium discount plan under Chapter 21, the use of insurance scoring as part of a rating plan is consistent with Chapter 24 and 26. All three chapters, however, prohibit rates that are “excessive, inadequate, or unfairly discriminatory.” MCL 500.2109(l)(a); MCL 500.2403(l)(d); MCL 500.2603(l)(d).
Defendant argues that insurance scoring is contrary to the Insurance Code because it produces rates that are unfairly discriminatory. As noted, Chapters 21, 24, and 26 all provide that “[r]ates shall not be... unfairly discriminatory.” MCL 500.2109(l)(a); MCL 500.2403(l)(d); MCL 500.2603(l)(d). Chapters 21, 24, and 26 define “unfairly discriminatory” in a nearly identical fashion:
A rate for a coverage is unfairly discriminatory in relation to another rate for the same coverage if the differential between the rates is not reasonably justified by differences in losses, expenses, or both, or by differences in the uncertainty of loss, for the individuals or risks to which the rates apply. A reasonable justification shall be supported by a reasonable classification system; by sound actuarial principles when applicable; and by actual and credible loss and expense statistics or, in the case of new coverages and classifications, by reasonably anticipated loss and expense experience. A rate is not unfairly discriminatory because it reflects differences in expenses for individuals or risks with similar anticipated losses, or because it reflects differences in losses for individuals or risks with similar expenses. [MCL 500.2109(l)(c); see also MCL 500.2403(l)(d); MCL 500.2603(l)(d).][29]
[402]*402An existing OFIS rule defines “reasonable classification system” as
a system designed to group individuals or risks with similar characteristics into rating classifications which are likely to identify significant differences in mean anticipated losses or expenses, or both, between the groups, as determined by sound actuarial principles and by actual and credible loss and expense statistics or, in the case of new coverages or classifications, by reasonably anticipated loss and expense experience. [Mich Admin Code, R 500.1505(3).]
Defendant and the dissent argue that insurance scoring is not a reasonable classification system because credit reports are unreliable and their use therefore results in misclassification of policyholders. Significantly, however, although the Commissioner also regulates the state banking and finance industries, the Commissioner has taken no action to curtail the use of credit reports in these industries. Indeed, the state of Michigan, including the Commissioner’s own office, employs credit reports to make thousands of decisions each year that affect Michigan residents. In 2009 alone, the state spent over $250,000 of taxpayer dollars to obtain thousands of credit reports.30 Indeed, by requiring the Commissioner and other state agencies to obtain credit reports, the Legislature has effectively determined that credit reports are reliable. See, e.g., MCL 493.137(4)(b)(¿) and MCL 493.163(l)(a)(ii).
In support of its argument that credit reports are inaccurate, defendant primarily relies on a 2003 report [403]*403by the United States General Accounting Office (GAO). The report is entitled “Limited Information Exists on Extent of Credit Report Errors and Their Implications for Consumers.”31 As the title suggests, the GAO study detailed in the report essentially found that too little information existed to draw any conclusions about the accuracy of credit reports. The GAO Report Highlights explain that “[information on the frequency, type, and cause of credit report errors is limited to the point that a comprehensive assessment of overall credit report accuracy using currently available information is not possible.” It further notes that “[industry officials and studies indicated that credit report errors could either help or hurt individual consumers depending on the nature of the error and the consumer’s personal circumstances.” Defendant cites three studies discussed in the report that raised concerns about the accuracy of credit reports: one by the Consumer Federation of America and National Credit Reporting Association, one by the U.S. Public Interest Research Group, and a survey conducted by Consumers Union and published by Consumer Reports. GAO Report, supra at 4-6. With respect to these studies, the GAO report concluded:
We cannot determine the frequency of errors in credit reports based on the Consumer Federation of America, U.S. PIRG, and Consumers Union studies. Two of the studies did not use a statistically representative methodology because they examined only the credit files of their employees who verified the accuracy of the information, and it was not clear if the sampling methodology in the third study was statistically projectable. Moreover, all three studies [404]*404counted any inaccuracy as an error regardless of potential impact. Similarly, the studies used varying definitions in identifying errors, and provided sometimes obscure explanations of how they carried out their work. Because of this, the findings may not represent the total population of credit reports maintained by the [consumer reporting agencies, or] CRAs. Moreover, none of these groups developed their findings in consultation with members of the credit reporting industry, who, according to a [Consumer Data Industry Association][32] representative, could have verified or refuted some of the claimed errors.
Beyond these limitations, a CDIA official stated that these studies misrepresented the frequency of errors because they assessed missing information as an error. According to CRA officials errors of omission may be mitigated in certain instances because certain lenders tend to use merged credit report files in making lending decisions .... [Id. at 9.]
The materials defendant cites for the proposition that credit reports are unreliable are inconclusive at best. Moreover, there is evidence in the administrative record that most of the “errors” in credit reports are minor ones, such as misspelled street names, that have little or no substantive effect on the actual insurance scoring itself. Plaintiffs’ Appendix in Docket No. 137400 at 118b-119b, 206b. See also the written testimony of Allstate Insurance Company, indicating that its “internal data,” derived from the more than 43.5 million credit reports it ordered in 2001, 2002, 2003, in connection with the use of insurance scoring models, “indicate] a minute amount of error.” Id. at 206b.33 Any [405]*405“unreliability” resulting from minor errors that have little or no effect on insurance scoring is irrelevant for purposes of the Insurance Code. In order for any unreliability to produce rates that are unfairly discriminatory within the meaning of the Insurance Code, the unreliability would have to result in a “differential between the rates” that “is not reasonably justified by differences in losses, expenses, or both, or by differences in the uncertainty of loss, for the individuals or risks to which the rates apply.” MCL 500.2109(l)(c); see also MCL 500.2403(l)(d); MCL 500.2603(l)(d). A rate is not unfairly discriminatory if there is a “reasonable justification” for the differential in rates “supported by a reasonable classification system.” Id. Here, plaintiffs have demonstrated that insurance scoring may be used to establish a “reasonable classification system.” Plain[406]*406tiffs’ “actual and credible loss statistics” indicate that insurance scoring may be used to establish a “system designed to group individuals or risks with similar characteristics which are likely to identify significant differences in mean anticipated losses or expenses, or both, between the groups.” Mich Admin Code, R 500.1505(3). For example, an affidavit of Dawn Elzinga, Director of Property Casualty Actuarial and an employee of plaintiff Farm Bureau, summarizes data collected by Farm Bureau reflecting its losses since Farm Bureau began using insurance scoring premium discounts for personal automobile insurance on July 1, 2000. From 2000 through 2004, insureds with the highest insurance scores (those receiving the largest discounts) filed 20 claims for every 100 cars insured, while insureds with the lowest insurance scores (those who were not receiving any discount) filed 28 claims for evexy 100 cars insured. See Plaintiffs Appendix in Docket No. 137407 at 124a-125a. Similarly, plaintiff Hastings submitted to the trial court actuarial analyses it commissioned in 2004 in order to comply with OFIS filing requirements. The analyses demonstrate a direct, linear relationship between insurance scores and risk for both automobile and homeowners policies. According to an affidavit of Keith E. Jandahl, Vice President of Underwriting for Hastings, these analyses were filed with OFIS, which never challenged the filing. See id. at 140a, 143a, and 145a.34
Accordingly, we reject defendant’s argument that the use of insurance scoring inherently violates the Insurance Code’s prohibition on rates that are “unfairly [407]*407discriminatory.” Because the Commissioner has no authority under the Insurance Code to ban a practice that the code permits, the OFIS rules exceed the scope of the Commissioner’s rulemaking authority under the Insurance Code. Under Luttrell, 421 Mich at 100, the OFIS rules are invalid.35
iv conclusion
The Commissioner has the authority to insure that insurers’ practices comply with the Insurance Code. Nothing about the practice of insurance scoring, however, amounts to a violation of the Insurance Code per se. The Commissioner exceeded her authority by enacting a total ban on a practice that the Insurance Code permits. Accordingly, we vacate the judgment of the Court of Appeals and reinstate the trial court’s order declaring the OFIS rules invalid and permanently enjoining their enforcement.
Weaver, Young, and Markman, JJ., concurred with Corrigan, J.