Joint Named Insureds Are “One Insured” Under A.R.S. § 20-259.01(H) for UM/UIM Anti-Stacking Limits

Introduction

In STATE FARM v. BALZAN (Ariz. July 6, 2026), the Arizona Supreme Court resolved a recurring UM/UIM stacking dispute under Arizona’s Uninsured/Underinsured Motorist Act, A.R.S. § 20-259.01. The case arose after Connor Balzan (an insured resident relative) sought to “stack” underinsured motorist (“UIM”) benefits across multiple State Farm policies following a single accident.

The key legal issue was narrow but consequential: when multiple named insureds (here, spouses Russell and Kimberly Balzan) jointly procure multiple policies with the same insurer, do they constitute “one insured” for purposes of the anti-stacking authorization in § 20-259.01(H)? If they are “one insured,” the insurer may enforce an anti-stacking limitation (if clearly stated in the policy) so that only one policy applies to a single accident.

Summary of the Opinion

The Court held that multiple named insureds who jointly procure UM/UIM coverage function as a single purchasing unit and therefore constitute “one insured” under A.R.S. § 20-259.01(H). The Court affirmed summary judgment for State Farm, concluding State Farm properly applied its anti-stacking provision to limit Connor to his own policy plus one of his parents’ household policies.

Procedurally, the Court vacated ¶¶ 12–16 of the court of appeals’ memorandum decision (which had reasoned Russell and Kimberly were not “one insured” but still restricted stacking on a joint-purchase theory) and affirmed the superior court’s judgment for State Farm.

Analysis

Precedents Cited

  • Franklin v. CSAA Gen. Ins. Co., 255 Ariz. 409 (2023)
    Role in this case: Franklin supplied the interpretive framework for ambiguous text within § 20-259.01(H). There, the Court found “coverages purchased” ambiguous in a dispute over intra-policy stacking and turned to history and purpose to interpret subsection (H). In Balzan, the Court treated “purchased by one insured” as similarly ambiguous and again used structural/purposive tools to identify the relevant “purchaser” as the named insured under subsection (B).
  • Am. Fam. Mut. Ins. Co. v. Sharp, 229 Ariz. 487 (2012)
    Role in this case: Sharp was cited for the proposition that § 20-259.01(H) is not a general insurance regulation but a provision specifically governing UM/UIM coverage. That contextual limitation supported reading “purchased by one insured” through the statute’s UM/UIM-specific structure, especially subsection (B)’s “named insured” election mechanism.
  • Beaver v. Am. Fam. Mut. Ins. Co., 234 Ariz. 584 (App. 2014)
    Role in this case: Beaver reinforced that the statutory authority to accept or reject UM/UIM coverage belongs to the named insured. Balzan used this to tie “purchased by one insured” in subsection (H) to the named insured’s statutory procurement authority in subsection (B), rather than to who paid premiums.
  • Lawrence v. State Farm Mut. Auto. Ins. Co., 184 Ariz. 145 (App. 1995)
    Role in this case: Lawrence supported the point that the statute does not contemplate separate UM/UIM “coverage elections” by other insureds (resident relatives, permissive users, passengers). This undercut Connor’s reading that multiple contributing insureds could be treated as separate “purchasers” for stacking purposes.
  • Taylor v. Travelers Indem. Co. of Am., 198 Ariz. 310 (2000)
    Role in this case: Taylor provided the canon that § 20-259.01 is remedial and generally favors coverage. Balzan acknowledged this pro-coverage orientation but emphasized that subsection (H) reflects a legislative choice to permit anti-stacking limitations under specified conditions.
  • State v. Serrato, 259 Ariz. 493 (2025) and Planned Parenthood Ariz., Inc. v. Mayes, 257 Ariz. 137 (2024)
    Role in this case: These cases supplied the methodology for addressing ambiguity: consider “spirit and purpose” and the “consequences of competing interpretations.”
  • State v. Luviano, 255 Ariz. 225 (2023)
    Role in this case: Luviano was cited for the proposition that when text is susceptible to two reasonable interpretations, courts must resort to secondary interpretive methods.
  • Columbus Life Ins. Co. v. Wilmington Tr., N.A., 255 Ariz. 382 (2023)
    Role in this case: Columbus Life supported the contextual reading principle: statutory language is read in context, not isolation—central to harmonizing subsection (H) with subsection (B).
  • Ariz. Pub. Integrity All. v. Fontes, 250 Ariz. 58 (2020), In re Drummond, 257 Ariz. 15 (2024), S. Ariz. Home Builders Ass'n v. Town of Marana, 254 Ariz. 281 (2023), and 4QTKIDZ, LLC v. HNT Holdings, LLC, 253 Ariz. 382 (2022)
    Role in this case: These decisions contributed general interpretive rules: de novo review; begin with the text; apply plain meaning in context; and if text is clear it controls unless absurd or unconstitutional.
  • In re Estate of Podgorski, 249 Ariz. 482 (App. 2020)
    Role in this case: Podgorski was cited for the summary judgment review standard and viewing facts in the light most favorable to the non-prevailing party.
  • Eng v. Stein, 123 Ariz. 343 (1979), Selby v. Savard, 134 Ariz. 222 (1982), Lorenz-Auxier Fin. Grp., Inc. v. Bidewell, 160 Ariz. 218 (App. 1989), and Hrudka v. Hrudka, 186 Ariz. 84 (App. 1995)
    Role in this case: These authorities anchored the Court’s rejection of community-property-based purchaser status. They establish that marriage does not collapse spouses into one legal person; spouses retain separate legal identities; and community property rules concern ownership/management rather than rewriting who “procured” contractually mandated coverage elections under § 20-259.01.
  • State Farm Mutual Automobile Insurance Co. v. Lindsey, 180 Ariz. 456 (App. 1994), vacated, 182 Ariz. 329 (1995)
    Role in this case: State Farm argued Lindsey supported using community property concepts to determine who “purchased” coverage. The Court deemed Lindsey “inapposite” to the statutory question here, characterizing it (at most) as addressing a property-ownership question rather than who exercised statutory authority to obtain UM/UIM coverage.

Legal Reasoning

  1. Identifying the operative statutory text—and the ambiguity.
    The dispute turned on the phrase in § 20-259.01(H) allowing insurers to limit stacking when “multiple policies or coverages purchased by one insured on different vehicles apply to an accident or claim.” The Court first noted that, grammatically, the same “insured” who is the “one insured” purchaser is also the “insured” who selects the applicable policy. But when subsection (H) is compared to subsection (B)—which repeatedly assigns UM/UIM election authority to the named insured—the “purchased by one insured” phrase becomes ambiguous because “insured” is undefined and could mean (i) anyone who pays or contributes to premiums or (ii) the party who procures coverage by accepting the statutory offer and entering the contract.
  2. Resolving ambiguity by harmonizing subsection (H) with subsection (B).
    The Court treated subsection (B) as the statute’s structural backbone: insurers must offer UM/UIM to the named insured, and the named insured’s election “extends to and covers all persons insured under the policy.” Because the statute does not envision separate elections by other insureds, interpreting “purchased by one insured” to include every premium contributor would erode subsection (B)’s single-decision-maker design.
  3. Purpose and consequences: preserving subsection (H)’s anti-stacking function.
    The Court acknowledged the remedial, pro-coverage character of § 20-259.01 (via Taylor v. Travelers Indem. Co. of Am.) but stressed that subsection (H) is an express legislative compromise permitting insurers to limit stacking when its prerequisites are satisfied. If “purchased” turned on tracing money, “purchasers” could become “effectively limitless” (spouses using community funds, children contributing to household expenses, etc.), making subsection (H) nearly inoperative in common household settings and upsetting the legislative balance.
  4. Community property does not redefine “purchaser” under § 20-259.01(H).
    The Court rejected the notion that paying premiums with community funds means each spouse is a separate statutory “purchaser.” Community property principles govern ownership/management of marital assets and creditor relations, but they do not merge spouses into one person or convert financial interest into statutory procurement authority. The controlling question is who exercised the legal authority to obtain UM/UIM coverage through the statutory offer-and-acceptance process vested in the named insured.
  5. The holding: joint named insureds “function collectively” as one statutory purchaser.
    The Court adopted a procurement-based definition: a person “purchases” UM/UIM coverage by procuring it—applying for it, accepting the offer, and entering the contract—not by paying or reimbursing premiums. From that premise, it drew the core rule: where multiple named insureds jointly procure coverage, “the two named insureds function collectively as the single statutory purchaser” and thus are “one insured” for subsection (H) purposes.

Impact

  • Clarifies “one insured” statewide in household/multi-named-insured policies.
    The decision establishes that “one insured” in § 20-259.01(H) is not a headcount of all insured persons or premium contributors; it is the statutory purchaser unit tied to the named insured’s procurement authority under subsection (B). This will frequently treat spouses listed as named insureds on declarations pages as a single “purchasing unit” for anti-stacking.
  • Reduces fact-intensive “who paid” litigation.
    By rejecting premium-source tracing (including community funds arguments) as dispositive, the Court shifts the inquiry toward objective indicia of procurement: the declarations, application process, and who exercised the UM/UIM election. This should streamline coverage litigation and reduce discovery into family finances.
  • Strengthens enforceability of clear anti-stacking provisions where the statute allows.
    Insurers who draft anti-stacking language consistent with § 20-259.01(H) (and satisfy the “clear and unambiguous” requirement referenced via Franklin v. CSAA Gen. Ins. Co.) gain more predictable ability to limit stacking across multiple policies procured by the same named insured “unit.”
  • Preserves a coverage/limitation balance.
    While the statute remains remedial and coverage-favoring, Balzan emphasizes that subsection (H) is a deliberate legislative constraint on multiple recoveries—particularly salient in multi-vehicle households where stacking demands are common.

Complex Concepts Simplified

UM/UIM coverage
Coverage that compensates an insured when the at-fault driver has no insurance (UM) or insufficient limits to pay the insured’s damages (UIM).
Stacking
Combining UM/UIM limits from more than one policy (or more than one coverage) to increase the total available benefits for a single accident. The opinion distinguishes:
  • Inter-policy stacking: stacking across separate policies on different vehicles.
  • Intra-policy stacking: stacking multiple vehicle coverages within a single policy (as discussed in Franklin v. CSAA Gen. Ins. Co.).
Anti-stacking provision
Policy language that limits stacking—typically requiring the insured to select only one policy/coverage to apply. Arizona permits such limits when consistent with § 20-259.01(H) and clearly stated.
Named insured vs. other insureds
The named insured is the person listed on the declarations page with statutory authority under § 20-259.01(B) to accept/reject UM/UIM coverage. “Other insureds” (resident relatives, permissive users, etc.) may be covered but do not make separate statutory coverage elections.
Statutory ambiguity and “secondary interpretive tools”
If statutory language can reasonably mean two different things, courts look beyond the text alone to context, purpose, and practical consequences (as cited via State v. Serrato and State v. Luviano).
Community property
A marital property regime governing ownership and management of property acquired during marriage. Balzan holds it does not decide who “purchased” UM/UIM coverage for § 20-259.01(H); procurement authority remains tied to the named insured’s statutory election.

Conclusion

STATE FARM v. BALZAN establishes a clear rule for Arizona UM/UIM stacking disputes: “Purchased by one insured” in A.R.S. § 20-259.01(H) refers to the named insured purchaser under § 20-259.01(B), and when multiple named insureds jointly procure coverage, they are treated as “one insured.” The Court’s approach aligns subsection (H) with subsection (B)’s named-insured election structure, avoids unworkable premium-source tracing (including community property arguments), and preserves the Legislature’s intended balance between broad UM/UIM protection and permitted limits on stacking.