OPINION
¶ 1 In 1996, the Arizona legislature amended this state’s marriage statutes to provide that certain marriages, even though “valid by the laws of the place where contracted,” were nonetheless “void and prohibited” in Arizona. S.B. 1038, 42d Leg., 2d Reg. Sess. (Ariz.1996); Ariz.Rev.Stat. (“A.R.S.”) § 25-112(A) (“1996 amendments”). We resolve statutory, choice-of-law, and constitutional issues that arise out of the 1996 amendments.
I.
¶ 2 Alan R. Cook (“appellant”) appeals from a decree of dissolution. He contests the trial court’s jurisdiction, alleging that there was no valid marriage. 1
¶ 3 Appellant and Peggy Cook (“appellee”) were married on April 7, 1984 in Virginia. They are first cousins. Marriage between first cousins was then (and is now) valid in Virginia. See Va.Code Ann. §§ 20-38.1 (1978) and 20-45.1 (1975) (statutes listing void and prohibited marriages do not include marriage between first cousins); Va.Code Ann. §§ 20-38.1 and 20-45.1 (West, WEST-LAW through 2004 Spec. Sess. II) (same). The parties have one minor child, born July 11, 1986.
¶ 4 In 1989 the parties moved to Arizona. Arizona’s statutory scheme (then and now) provides that a marriage between first cousins in Arizona is “void.” A.R.S. § 25-101. 2 However, when the Cooks moved to Arizona, *479 our law also provided that “[m]arriages valid by the laws of the place where contracted are valid in this state.” Arizona Code of 1939, § 63-108 (currently codified as A.R.S. § 25-112(A)) (emphasis added). Effective July 20, 1996, the legislature amended § 25-112(A) to add the phrase, “except marriages that are void and prohibited by § 25-101.” 1996 amendments. The text of A.R.S. § 25-112, with the 1996 amendments in bold, is as follows:
A. Marriages valid by the laws of the place where contracted are valid in this state, except marriages that are void and prohibited by § 25-101.
B. Marriages solemnized in another state or country by parties intending at the time to reside in this state shall have the same legal consequences and effect as if solemnized in this state, except marriages that are void and prohibited by § 25-101.
C. Parties residing in this state may not evade the laws of this state relating to marriage by going to another state or country for solemnization of the marriage.
A.R.S. § 25-112. Thus, under the plain language of § 25-112(A), the Cook’s marriage was “valid” in Arizona in 1989 (when they moved here) but subsequently declared “void” by the 1996 amendments.
¶ 5 On January 3, 1997, appellant filed a petition for marital dissolution in the superi- or court. Though initially alleging there was a marriage, appellant subsequently filed a motion to amend/dismiss dissolution proceedings alleging that the parties’ marriage was void and prohibited under A.R.S. §§ 25-101 and -112(A). The trial court denied the motion. It held, in part, that Arizona law prior to the 1996 amendments did not preclude recognition of a marriage valid in other states that was void in Arizona pursuant to § 25-101. It then reasoned that because the law prior to the 1996 amendments permitted recognition of the first cousin marriage in this circumstance, the 1996 amendments could not be retroactively applied to void a marriage that was valid at the time the parties moved to Arizona.
¶ 6 After denial of the motion, trial ensued. The trial court entered various orders as to property, spousal maintenance, and other issues. Appellant timely appealed. The only issue we take up in this opinion is that of the validity of the marriage.
II.
¶ 7 The first question we must decide is whether the validity of the marriage should be determined under Arizona or Virginia law. If determined under Virginia law, the marriage is valid; if determined under Arizona law, we are presented with statutory and constitutional issues as to whether the marriage is valid. It is unnecessary to address those issues if Virginia law applies. When the material facts, as here, are uncontested this question is a matter of law which we determine
de novo. Swanson v. Image Bank, Inc.,
¶ 8 With a significant exception applicable here, Arizona follows the general rule that it is the law of the place where the marriage is celebrated, not the law of the place where the divorce takes place, that determines the validity of the marriage.
Horton v. Horton,
It is the general rule of law that a marriage valid under the laws of the country where contracted will be recognized as valid everywhere. The question of the validity of the marriage, therefore, depends upon the place where it is contracted, and not the place where an action for divorce is brought.
Gradias v. Gradias,
¶ 9 Just as enduring as the general rule, however, has been Arizona’s exception to that rule; namely, that the
power
to define a valid marriage is vested in this state’s legislature and not in the legislature (or judiciary) of another state nor in the judiciary of this state.
Horton,
The Legislature undoubtedly had the power to enact what marriages shall be void in this state, notwithstanding their validity in the state where celebrated, whethér contracted between parties who were in good faith domiciled in the state where the ceremony was performed, or between parties who, being domiciled in this state, left the state for the purpose of avoiding its statutes and married.
Horton,
¶ 10 Of course, as with all exercises of legislative power, the legislature’s enactments on this subject are subject to the limitations of the United States and the Arizona Constitutions. U.S. Const. art. VI, cl. 2 (Supremacy Clause); Ariz. Const. art. 2, § 3 (“The Constitution of the United States is the supreme law of the land.”);
Marburg v. Madison,
¶ 11 In considering the choice-of-law issues surrounding out-of-state marriages, it is important to consider Arizona’s treatment of the pertinent principles set forth in the Restatement (Second) of Conflict of Laws (1971) (“Restatement”) pertaining to marriage. While Arizona invokes some principles from the Restatement, we do not follow it in certain significant regards. Specifically, Restatement § 283(1) and (2) both invoke the element of which state had “the most significant relationship” to the parties at the time of the marriage in determining which state’s law to apply. Section 283(1) provides that “[t]he validity of a marriage will be determined by the local law of the state which, with respect to the particular issue, has the most significant relationship to the spouses and the marriage under the principles stated in § 6.” Section 6(1) then provides as follows: “A court, subject to constitutional restrictions, will follow a statutory directive of
its own state
on choice of law.” (Emphasis added.) This principle from § 6(1) giving preeminence to the legislative pronouncement of “its own state” is consistent with
Horton,
and subsequent authorities.
See, e.g., Vandever,
¶ 12 Section 283(2) of the Restatement, however, does not include this deference to the legislature of the forum state. It states the general rule that “[a] marriage which satisfies the requirements of the state where the marriage was contracted will everywhere be recognized as valid.” Unless the legislature has declared otherwise, Arizona follows this formulation of the general rule. Supra ¶¶ 8-9. Arizona does not, however, follow the exception stated in § 283(2).
¶ 13 The exception that Restatement § 283(2) provides to the general rule is based on the policy of the state with the “most significant relationship.” Section 283(2) applies the general rule “unless it violates the strong public policy
of another state which had the most significant relationship
to the spouses and the marriage at the time of the
*481
marriage.” Restatement (Second) of Conflict of Laws § 283(2) (1971) (emphasis added). As
Horton
expressly holds, the Arizona legislature is free to ignore (subject to constitutional constraints) the policy considerations of another state in determining whether marriages are valid or void in Arizona
regardless
of whether that other state had the more significant relationship.
“The Legislature undoubtedly had the power to enact what marriages shall be void in this state, notwithstanding their validity in the state where celebrated,
whether contracted between parties who were in good faith domiciled in the state where the ceremony was performed” or not.
Horton,
¶ 14 In
Vandever,
the parties were arguably domiciled in Arizona, yet one party contended that a common-law marriage had been entered into pursuant to the law of Colorado. This court expressly rejected a request to “incorporate[ ] into A.R.S. § 25-112 a choice-of-law analysis that would require this court to discern which state has the most significant contacts with the [marriage] relationship.”
¶ 15
Vandever’s
analysis was based on
Horton’s
pronouncement regarding the power of the legislature to define what was, and what was not, a valid marriage.
Id.
at 376-77,
¶ 16 A second pertinent case to this point is
Donlann v. Macgurn,
¶ 17 The general rule explicitly stated in
Donlann
is the same rule from
Horton, Vandever,
and here:
“Unless strong public policy exceptions require otherwise,
the validity of the marriage is generally determined by the law of the place of marriage.”
,¶ 18 That our cases instruct us to look to Arizona’s statutes on the validity of marriage — even if another state has a more significant relationship — is particularly apt given the importance of marriage and the present divergent views on that subject. Marriage is a foundation stone in the bedrock of our state and communities. As the United States Supreme Court long ago said, “marriage ... is an institution, in the maintenance of which in its purity the public is deeply interested, for it is the foundation of the family and of society, without which there would be neither civilization nor progress.”
Maynard v. Hill,
¶ 19 Thus, under a conflict-of-law analysis, Arizona authorities require us to recognize the preeminence of the Arizona legislature’s express statutory enactments as to whether a particular out-of-state marriage is valid or void in Arizona. We do not apply the law from the state of Virginia, even though Virginia had the most significant relationship to the parties at the time of the marriage.
III.
A.
¶ 20 Having determined that we apply Arizona law, as opposed to Virginia law, 6 we now turn to the Arizona statute.
¶ 21 When considering a statute we are required to give it, if possible, a constitutional interpretation.
Hayes v. Continental Ins. Co.,
¶ 22 Appellee argues that her marriage was recognized in Arizona prior to the 1996 *484 amendments and became, in her case, a substantively vested right. She further argues that if we construe the 1996 amendments to take away this vested right, A.R.S. § 25-112(A) runs afoul of Arizona’s prohibition against retroactive legislation. For the following reasons, we agree. Because an alternative construction is available to us, we adopt that construction.
B.
¶ 23 In 1989, when the parties moved to Arizona, they had a marriage that was validly recognized in Virginia. Section 25-112(A) expressly provided that marriages valid in another state were valid here. The only statutory exceptions occurred when residents of this state left Arizona to contract a marriage prohibited in Arizona with the intent of returning. A.R.S. § 25-112(B), (C);
see In re Mortenson’s Estate,
¶ 24 Not all retroactive legislation, however, is prohibited. “A statute that is merely procedural may be applied retroactively.”
San Carlos Apache Tribe v. Superi- or Court (Bolton),
¶ 25 Appellant argues that the 1996 amendments are procedural only, not substantive. We reject this argument. If given the construction appellant urges, a marriage that was previously recognized on behalf of Arizona residents of seven years’ duration would be taken away from them. The statutory grant of marriage is more than a procedural right. It goes to the bedrock of our society.
Supra
¶ 18. Marriage is a substantive right. As was the case in
Hall,
“[t]he critical inquiry in retroactivity analysis [here] is not whether a statute affects a
substantive
right but whether a statute affects a
vested
right.”
Thus, the implicit meaning of the statement “substantive rights may not be retroactively impaired” is “substantive rights may not be impaired once vested.”
Id.
at 139—40,
¶ 26 Determining whether that right (the recognition of one’s marriage) has vested does not fit neatly into our jurisprudence concerning vested rights.
8
The language of
*485
the law in this area deals primarily with
property
rights.
See Aranda v. Indus. Comm’n,
¶ 27 Notwithstanding the application of the “vested right” concept primarily to cases involving property, the
standard
for determining such rights has been defined to allow recognition of the right here. As early as 1913 our supreme court defined “vested” rights as follows:
Steinfeld v. Nielsen,
“Rights are vested, in contradistinction to being expectant or contingent. They are vested, when the right to enjoyment, present or prospective, has become the property of some particular person or persons as a present interest____” A “vested right” is defined to be an immediate fixed right to present or future enjoyment, or where the interest does not depend on a period, or an event, that is uncertain.
¶ 28 Though not controlling, our conclusion that appellee has a vested right in the validity of her marriage is also supported by Arizona law pertaining to community property. A spouse’s interest in the marital community includes a “vested property interest.”
Hatch v. Hatch,
C.
¶ 29 We emphasize that we, as a court, do not act to create a right. Prior to 1996, the Arizona legislature specifically stated that “[m]arriages valid by the laws of the place where contracted are valid in this state.” Arizona Code of 1939, § 63-109 (currently codified as A.R.S. § 25-112(A)). When the parties moved from Virginia to *486 Arizona in 1989, their marriage was valid under the laws of the state of Arizona, not simply under Virginia law. Sections 25-112(B) and (C) only precluded marriages validly performed out of state when those marriages were undertaken “by parties intending at the time to reside in this state” or “parties residing in this state” who sought to “evade the laws of this state relating to marriage by going to another state or country for solemnization of the marriage.” A.R.S. §§ 25-112(B), (C).
¶ 30
Horton
expressly recognized the legislature’s ability to declare marriages “void” that were “valid[] in the state where celebrated whether [1] contracted between parties who were in good faith domiciled in the state where the ceremony was performed, or [2] between parties who, being domiciled in this state, left the state for the purpose of avoiding its statutes and married.”
¶ 31 Thus, the statutory scheme in place in 1989, when the parties moved here, expressly recognized appellee’s marriage. The exceptions identified in § 25-112(B) and (C) are inapplicable as neither appellee nor appellant sought to evade Arizona law when they married in Virginia. They were validly married in Virginia before coming to Arizona. The fact that Arizona would have prohibited their marriage, had they resided here, is of no consequence as the legislature (up until the 1996 amendments) expressly chose to recognize their valid out-of-state marriage.
¶ 32 Accordingly, in the context of a claim of a “void” marriage under § 25-112(A), we hold that one’s right to have an out-of-state marriage deemed valid in the state of Arizona vests upon the following conditions: (1) the marriage was valid in the state where contracted; (2) the parties to the marriage were residents of Arizona prior to the enactment of the amendment to § 25-112(A) on July 20, 1996; and (3) that during this period of residency in Arizona their marriage was validly recognized under the statutory scheme then in place in Arizona. 9
D.
¶ 33 By construing the statute to apply prospectively only, we harmonize the 1996 amendments with Arizona’s constitutional prohibitions against retroactive legislation. We do not impair the legislature’s expressly recognized ability to declare as “void” marriages recognized as valid in other jurisdictions,
Horton,
¶ 34 Further, A.R.S. § 1-244 (2000) expressly provides that “[n]o statute is retroactive unless expressly declared therein.” We *487 can give effect to the legislature’s use of the word “void” in the 1996 amendments by applying that term to exclude vested rights in existing marriages as we have described them. Had the legislature chosen to nullify existing marriages (thus having the retroactive effect described) it could have expressly stated so. It did not.
¶ 35 Accordingly, we can give legitimate meaning to the term “void” in the 1996 amendments by applying it to marriages from other jurisdictions in which the parties had no vested right to have their marriage recognized in Arizona. As to these marriages, the use of the term “void” applies and means that such a marriage “shall have no force and effect for any purpose within the State of Arizona.”
In re Mortenson’s Estate,
IV.
¶ 36 For the reasons set forth above, and those in the separately filed memorandum decision, we affirm the judgment of the trial court.
Notes
. He also asserts other errors which we address in our memorandum decision pursuant to. Arizona Rule of Civil Appellate Procedure 28(g). That rule provides for partial publication of decisions "[wjhen the court issuing a decision concludes that only a portion of that decision meets the criteria for publication as an opinion.”
. A.R.S. § 25-101, in place since 1962, reads as follows:
A. Marriage between parents and children, including grandparents and grandchildren of every degree, between brothers and sisters of the one-half as well as the whole blood, and between uncles and nieces, aunts and nephews and between first cousins, is prohibited and void.
Subsection B was added in 1990. It reads:
B. Notwithstanding subsection A, first cousins may marry if both are sixty-five years of age or older or if one or both first cousins are under sixty-five years of age, upon approval of any superior court judge in the state if proof has been presented to the judge that one of the cousins is unable to reproduce.
. "Lex loci” is a Latin phrase which means "[t]he law of the place; local law.” Black's Law Dictionary 923 (7th ed.1999).
. Although our cases do not recognize a “most significant relationship” test as applied to the issue of which out-of-state marriages to recognize, this does not mean a "most significant relationship” test is inappropriate in other circumstances.
See, e.g., Baroldy v. Ortho Pharm. Corp.,
. For a sampling of authorities arguing in favor of a traditional view of marriage, see, e.g., Linda J. Waite & Maggie Gallagher, THE CASE FOR MARRIAGE: WHY MARRIED PEOPLE ARE HAPPIER, HEALTHIER, AND BETTER OFF FINANCIALLY 11 (2000) ("[Mjarriage can work its miracles only if it is supported by the whole society. [M]arriage cannot thrive, and may not even survive, in a culture that views it as just another lifestyle option.”); David Orgon Coolidge & William C. Duncan, Reaffirming Marriage: A Presidential Priority, 24 HARV. J.L. & PUB. POL'Y, 623, 638 (2001) (“If Americans believe that children thrive best with both a mother and father, and that marriage is the central social institution that brings men, women and children together, they should have the right to recognize an institution in law and support it in public policy.”); Lynn D. Wardle, The Potential Impact of Homosexual Parenting on Children, 1997 U. Ill. L.Rev. 833, 911 (arguing that support for same-sex marriage and parenting is premature and providing an appendix of social scientific studies on same-sex parenting); Stanley Kurtz, The End of Marriage in Scandinavia: The “Conservative Case" for Same-Sex Marriage Collapses, THE WEEKLY STANDARD, February 2, 2004, at 26, 33 (arguing for strengthened "links between American marriage and parenthood”); David Orgon Coolidge, Same-Sex Marriage? Baehr and Miike and the Meaning of Marriage, 38 S. Tex. L.Rev. 1, 30 (1997) ("The traditional view [of marriage] ... has been the basis for defining *483 marriage in male-female terms in custom and law.”).
For authorities that urge consideration of traditional marriage as one of many acceptable family structures, see, e.g., ALI-PRINCIPLES §§ 6.01-06 (setting forth principles for recognition of "domestic partners”); id. at § 6.02 cmt. a (contending that "although society’s interest in the orderly administration of justice and the stability of families are best served when the formalities of marriage are observed, a rapidly increasing percentage of Americans form domestic relationships without such formalities”); Stephanie Coontz, THE WAY WE REALLY ARE 172 (1997) (urging that we "stop arguing about the relative merits of ideal family types”); David L. Chambers, For the Best of Friends and for Lovers of All Sorts, A Status Other Than Marriage, 76 NOTRE DAME L. REV. 1347, 1348 (2001) (submitting that a "designated friend” legal status should be given to any two people who agree to have mutual responsibilities); William N. Esk-ridge, Jr., Comparative Law and the Same-Sex Maniage Debate: A Step-byStep Approach toward State Recognition, 31 MCGEORGE L. REV. 641, 661 (2000) (arguing in favor of same-sex marriage and commenting on the "hysteria and irresponsibility in opponents’ predictions” that it will undermine the institution of marriage); Paula L. Ettelbrick, Domestic Partnership, Civil Unions, or Marriage: One Size Does Not Fit All, 64 ALB. L. REV. 905, 914 (2001) (arguing that the law should reflect numerous and different forms of family relationships that exist in our society); Naomi Cahn, Alone Together: Law and the Meaning of Marriage, 98 Mich. L.Rev. 1766, 1768 (2000) (asking "why not allow adults to choose their own means of commitment to each other[?]”).
. On appeal, appellee also raised three different arguments for the application of Virginia law based on the United States Constitution: the Full Faith and Credit Clause, the Contracts Clause, and the right to interstate travel. The Contracts Clause argument and the right to interstate travel were not raised in the trial court. The Full Faith and Credit Clause was briefly mentioned in the trial court but without any recitation of authorities. Accordingly, on this record, we consider these constitutional issues waived.
K.B. v. State Farm Fire & Cas. Co.,
. The court may only strike down legislation when it is in violation of the United States or Arizona Constitution.
Supra
¶ 10. There is no express constitutional provision in either Constitution that prohibits retroactive legislation. Our supreme court, however, has located that right in the substantive due process and separation of powers doctrines under the Arizona and United States Constitutions.
San Carlos,
. We agree that "[t]he rule that legislation may not retroactively disturb vested rights is simple enough; the difficulty arises in defining a vested
*485
right, and determining when a right actually vests.”
Hall,
. A party cannot avoid these requirements by estoppel. Appellee also claims that appellant is estopped from arguing that the marriage is void because he requested the dissolution of the marriage. Were we to adopt this reasoning the state would forfeit its power to regulate marriage where parties stipulated to marriage. " 'Parties cannot stipulate as to the law applicable to a given state of facts and bind the court.' "
Word v. Motorola, Inc.,
