opinion of the Court:
INTRODUCTION
{1 Shortly before she passed away in 2006, Darlene Patterson (Darlene) executed an amendment (the Amendment) to the Darlene Patterson Family Protection Trust (the Trust). The purpose of the Amendment was to remove Darlene's son Ronald Patterson (Ron) as a beneficiary. On summary judgment, the district court invalidated the Amendment based on its interpretation of our opinion in Banks v. Means,
BACKGROUND
4 2 Darlene Patterson created the Darlene Patterson Family Protection Trust in 1999.
T3 In 2006, Darlene executed the Amendment. The purpose of the Amendment was to remove Darlene's son Ron as a beneficiary of the Trust. The Amendment stated, "I have intentionally not provided anything for my son Ronald S. Patterson (or his descendants) since I have already properly provided for this son during his lifetime as I felt was appropriate." Eleven months after exeeut-ing the Amendment, Darlene passed away.
114 Shortly after his mother passed away, Ron filed a lawsuit against the Trust and Darlene's estate in which he sought a declaration that the Amendment was void because it violated the terms of the Trust.
5 The district court granted Ron's motion for partial summary judgment and denied Randy's cross-motion. Concluding that it was bound by Banks and its progeny, the district court ruled that the Amendment was invalid because it attempted to completely divest Ron of his interest in the Trust without revoking the Trust, as required by Banks.
T6 Randy filed a petition for interlocutory appeal, which we granted. We have jurisdiction pursuant to Utah Code section 78A-8-102(8)().
STANDARD OF REVIEW
7 Summary judgment is appropriate where there are no genuine issues as to any material fact and the moving party is entitled to judgment as a matter of law. UTax R. Crv. P. 56(c). When reviewing the district court's ruling on a motion for summary judgment, "we consider the facts and all reasonable inferences to be drawn therefrom in the light most favorable to the nonmoving party." Salt Lake City Corp. v. Big Ditch Irrigation Co.,
ANALYSIS
T8 Randy argues that the district court erred in deciding the case under Banks v. Means,
T 9 Our preservation rules do not preclude Randy from arguing that the UUTC has statutorily overruled Banks. And, after considering Randy's argument, we conclude that the UUTC has statutorily overruled Banks. The UUTC, which allows for liberal modification of revocable trusts, directly conflicts with our holding in Banks that a settlor must strictly comply with the terms of a trust in order to modify it. Applying the UUTC to the undisputed facts in this case, we hold that the Amendment effectively terminated Ron's interest in the Trust.
I. WE WILL NOT IGNORE THE UUTC EVEN THOUGH RANDY DID NOT ARGUE ITS APPLICABILITY BELOW
110 We first consider whether Randy is barred from arguing the applicability of the UUTC. Randy concedes that he did not raise the UUTC in the trial court. And he does not argue the applicability of any of the exceptions to our preservation requirement. Rather, he contends he raised and argued the broader issue of whether Darlene's Amendment is valid and suggests that the UUTC is simply one of the arguments supporting the validity of the Amendment. In Randy's view, his argument that the Amendment is valid under the UUTC is properly before us because it goes to the ultimate issue decided by the district court. Ron counters by attempting to frame the "issue" more narrowly. As Ron sees it, the issue decided below was whether Darlene's Amendment was valid under Banks and its progeny.
{11 We take this occasion to discuss our preservation requirement and to clarify its application. Randy attempts to avoid our preservation rule by broadly defining the "issue" decided by the district court. We reject this approach,. Nonetheless, we hold that our preservation rule does not prevent Randy from arguing the applicability of the UUTC because the UUTC is controlling authority that directly bears upon the issue that Randy did raisge-whether our holding in Banks should be overruled.
112 We generally will not consider an issue unless it has been preserved for
113 Our preservation requirement is self-imposed and is therefore one of prudence rather than jurisdiction. Consequently, we exercise wide discretion when deciding whether to entertain or reject matters that are first raised on appeal. We have exercised this discretion to recognize some limited exceptions to our general preservation rule. For example, we have reached matters not raised below under "exceptional cireum-stances," or when "plain error" has occurred. See, e.g., Meadow Valley Contractors, Inc. v. State Dep't of Transp.,
14 Randy has asked us to draw a distinction between "issues" and "arguments" when determining whether to apply our preservation rule. Courts in some jurisdictions have recognized a distinction between new "issues" or "theories" and new "arguments," allowing the latter but not the former to be raised for the first time on appeal. See, eg., Kerbs v. Cal. E. Airways, Inc.,
{16 The second consideration underlying the preservation rule is fairness. It generally would be unfair to reverse a district court for a reason presented first on appeal. See, e.g., Nielsen v. Brocksmith,
{17 This court and the Utah Court of Appeals have on countless occasions exercised our discretion to refuse to consider new issues, arguments, claims, or matters on appeal. See, eg., Carrier v. Salt Lake Cnty.,
118 But we routinely consider new authority relevant to issues that have properly been preserved,
{19 We acknowledge that our decision to reach Randy's argument may undermine some of the policies underlying the preservation requirement. For example, had Randy raised and argued the applicability of the UUTC in the district court, the court may have ruled in Randy's favor and this appeal would have been avoided. In addition, it is not entirely fair to characterize the district court's ruling as "error" because it did not have the statute before it.
20 But there are other important considerations that cut against application of the preservation rule in this situation. First, consideration of the UUTC is necessary to a proper decision. As the state's highest court, we have a responsibility to maintain a sound and uniform body of precedent and must apply the statutes duly enacted into law. Refusing to consider Randy's statutory argument in this case would cause us to issue an opinion in contravention of a duly enacted controlling statute. This we will not do. See Kaiserman Assocs., Inc. v. Francis Town,
121 In summary, we decline to ignore controlling law because counsel failed to argue it below. We therefore consider Randy's argument that the Amendment is valid under section 75-7-605 of the UUTC.
II. THE UUTC SUPERSEDES BANKS
122 Having decided to reach the merits of Randy's argument, we now consider whether Banks or the UUTC controls the validity of Darlene's Amendment. Randy argues that the statute governs. He contends that Banks has been effectively overruled by the UUTC. Specifically, he argues that Banks' holding that a settlor must strictly comply with the terms of a revocable trust in order to divest a beneficiary of an interest directly conflicts with the provisions of the UUTC, which allow for liberal amendment of such trusts. Ron responds that the statute does not conflict with the Banks' holding that a settlor must entirely revoke, rather than amend, a trust in order to divest the interest of a beneficiary. We agree with Randy.
1[ 23 We begin with a discussion of relevant case law. Three times in the past decade, this court has examined the validity of trust amendments that reduced or eliminated the interests of beneficiaries in revocable trusts.
124 Days before her death, the settlor executed an amendment to the trust. Id. 15. Under the terms of the amendment, the set-tlor's sister became the primary beneficiary and the settlor's children became alternate beneficiaries, who would take only if the set-tlor's sister predeceased her. Id. The children challenged the amendment. Id. 16.
125 We began our analysis by reciting the general common law rule that "[a] trust is a form of ownership in which the legal title to property is vested in a trustee, who has equitable duties to hold and manage it for the benefit of the beneficiaries." Id. T 9 (alteration in original) (internal quotation marks omitted). We also stated that "[the creation of a trust involves the transfer of property interests" which "cannot be taken from [the beneficiaries] except in accordance with a provision of the trust instrument." Id. (alterations in original) (internal quotation marks omitted).
26 Applying this general framework, we concluded that although the settlor expressly reserved the right to amend, modify, or revoke the trust, she had also created vested interests in her children by specifically providing that those interests would continue until the trust was revoked or terminated. Id. 112. Thus, we concluded that a complete revocation was required to "divest" a benefi-clary's interest. Id. Because the settlor had only amended the trust rather than completely revoking it, we held that her attempt to terminate the interests of her children was invalid. Id. 116.
127 We revisited the issue just nine months later in Flake v. Flake (In re Estate of Flake,
28 In Flake, we distinguished Banks by noting that the primary effect of the "present vested interest" language used in the Banks and Flake trusts was "to save the Trust from the doctrine of merger and to prove that the Trust [was] not illusory." Id. And we recognized that the use of that language was a product of our holding in Groesbeck v. Groesbeck (In re Estate of Groesbeck),
129 Our most recent decision addressing the issue presented here is Hoggan v. Hoggan,
130 In a lengthy footnote, we reiterated and elaborated upon our concerns regarding language in revocable living trusts that purported to give beneficiaries "present vested interests." Id. T11 n. 2. We characterized the use of this language as "unfortunate[ |" because it has "the potential to produce results not within the contemplation of the drafters of trusts or their clients." Id. And we noted the language "simply contradicts the operative terms of the trust" because in revocable trusts "the beneficiaries have no immediate right of possession or enjoyment of the trust property." Id. "[TJrusts in which the settlor retains the right to amend or revoke the instrument do not convey 'presently vested rights' to beneficiaries because their interests are contingent upon the set-tlor not amending or revoking the trust." Id. And we expressly disavowed the requirement that a revocable trust create "vested interests" in order to be deemed nonillusory. Id.
181 In summary, Banks held that the settlor of a revocable trust could terminate the interest of a beneficiary only by completely revoking the trust. But in Flake and Hoggan, we held that a settlor could significantly reduce a beneficiary's interest by mere amendment. In other words, the set-tlor of a revocable trust could not wholly eliminate a beneficiary's interest by amendment but could effectively do so by reducing the interest to a trifle.
32 Significantly, we did not consider or apply statutory law in any of these cases because revocable trusts were not among the limited topics addressed by Utah's Uniform Probate Code. See Urax Cop® Ann. §§ 75-1-101 to -8-~101 (1993) (repealed 2004). Rather, all three cases were decided exclusively as a matter of common law.
T 33 In 2004, the Utah Legislature enacted the UUTC.2004 Utah Laws 332. The UUTC governs the creation, administration, and adjudication of trusts. See Utan CopE® Axx. §§ 75-7-401 to -417 (Supp.2011). It "applies to ... all trusts created before, on, or after July 1, 2004[and] all judicial proceedings concerning trusts commenced on or after July 1, 2004." Id. § 75-7T-1108(1)(a)-(b). Courts must apply the UUTC "liberally ... to promote its underlying purposes and policies," one of which is "[t]o discover and make effective the intent of a decedent in distribution of his property." Id. § 75-1-102(1), @)(b) (19983).
{34 The UUTC contains an article dedicated solely to revocable trusts. Id. §§ 75-7-604 to -607 (Supp.2011). The structure and content of the article reflects a legislative acknowledgment of the increasingly widespread use of revocable trusts as substitutes for wills.
1 35 Most importantly, the UUTC treats a living trust as the functional equivalent of a will. Indicative of this fact is the UUTC's treatment of revocation and amendment. It is black letter law that a testator has complete control to amend, modify, or revoke his will during his lifetime. E.g., 79 Am.Jur. 2d Wills § 500 (1975) ('Revocability is an essential characteristic of a will.... Wills are revocable to such an unlimited degree that even an express provision in a will providing that it is not revocable [does not] prevent [revocation]."). Similarly, the UUTC recognizes that during the period in which a revocable trust is in effect, all of the rights held by beneficiaries are controlled exclusively by the settlor. Urax Cop® Ann. § 75-7-606(1) (Supp.2011) ("While a trust is revocable and the settlor has the capacity to revoke the trust, rights of the beneficiaries are subject to the control of ... the settlor."). Thus, just as a testator has flexibility over the manner in which he can revoke all or part of his will, id. § 75-2-507, the UUTC contains a provision giving a settlor wide latitude to effectuate his control over the disposition of trust assets. Specifically, section 75-7-605(8) allows a settlor to revoke, amend, or modify a revocable trust in any of the following ways:
(a) by substantially complying with a method provided in the terms of the trust; or
(b) if the terms of the trust do not provide a method or the method provided in the terms is not expressly made exelusive, by:
() executing a later will or codicil that expressly refers to the trust or specifically devises property that would otherwise have passed according to the terms of the trust; or
(i) any other method manifesting clear and convincing evidence of the settlor's intent.
Id. § 75-1-605(8).
136 This section of the UUTC directly conflicts with the holding of Banks. Under Banks, the settlor's intent at the time of creation of the trust was paramount because the settlor has created the trust he is no longer the owner of the trust property and has only such ability to deal with it as is expressly reserved to him in the trust instrument." Banks,
137 It is axiomatic that our precedent must yield when it conflicts with a validly enacted statute. E.g., Gottling v. P.R. Inc.,
III. DARLENE PROPERLY TERML-NATED RON'S INTEREST IN THE TRUST BY COMPLYING WITH UTAH CODE SECTION 75-7-605
138 Having determined that the UUTC, rather than Banks, controls this case, we now apply the statute to determine the validity of Darlene's Amendment. Randy argues that the Amendment is valid because the terms of the Trust do not provide an exclusive method of amendment or revocation and the Amendment qualifies as a clear expression of Darlene's intent to terminate Ron's interest as a beneficiary. We agree.
1839 Under section 75-7-605, a "settlor may revoke or amend a revocable trust ... by substantially complying with a method provided in the terms of the trust." UTaK Cope Ann. § 75-7-605(8)(a) (Supp.2011). Alternatively, if the terms of a revocable trust do not provide a method for revocation or amendment that is "expressly made exclusive," the settlor may amend or revoke the trust by "any ... method manifesting clear and convincing evidence of the settlor's intent." Id. §
140 Here, the Trust purported to grant the beneficiaries "presently vested interests subject to divestment which shall continue until this Trust is revoked or terminated other than by death." As expressly recognized in Hoggan, this language does not actually create a "present" or "vested" interest.
{41 We conclude that the terms of the Trust do not provide a method for amendment or revocation that is expressly made exclusive. The Trust states that it "may" be amended or revoked by written instrument "delivered in writing to the then acting Trustee." But it does not expressly state that this is the only permissible method.
CONCLUSION
4 42 We reverse the district court's ruling granting Ron's motion for partial summary judgment and denying Randy's eross-motion. Although we acknowledge that Randy did not raise the UUTC in the district court, he did argue that the rule we articulated in Banks should be overruled. And because the legislature effectively overruled Banks when it passed the UUTC, we are obliged to apply the controlling statute.
T48 The UUTC seeks to effectuate set-tlors' intent by allowing for liberal amendment or revocation of revocable trusts. Applying the UUTC to the facts of this case, we hold that Darlene's Amendment is valid.
Notes
. After creating the Trust, but before making the Amendment at issue here, Darlene executed another amendment and a restatement of the Trust. The validity of these instruments is not at issue in this case. Therefore, we refer to the original trust instrument, the first amendment, and the restatement collectively as the "Trust."
. Ron's amended complaint contained eleven causes of action. Only the first cause of action is at issue in this appeal.
. See also Singleton v. Wulff,
. Of course, a court's subject matter jurisdiction may be challenged at any time, and an appellate court has no discretion whether to consider the challenge. See Utan R. Civ. P. 12(h)(2) (stating that "whenever it appears by suggestion of the parties or otherwise that the court lacks jurisdiction of the subject matter, the court shall dismiss the action"); see also In Re Adoption of Baby E.Z.,
. See also In re Estate of Sims,
. Utah's appellate courts are not alone in conflating the terms "issue," "argument," "matter," and "theory." See, eg., Wingert v. Yellow Freight Sys., Inc.,
. For example, we have always allowed parties to supplement an argument with new cases or relevant legislative history that they did not raise in the district court.
. See also United States v. Certain Parcels of Land in Philadelphia,
. We do not intend to suggest that counsel for either party has violated this rule. Indeed, the failure to raise the UUTC appears to be the result of inadvertence.
. Although Hoggan was not decided until 2007-after the UUTC was enacted-the parties in that case never raised the UUTC, and the court was apparently unaware of its passage.
. According to at least one legal scholar, revocable trusts are now the most commonly used trust in the United States. David M. English, The Uniform Trust Code (2000): Significant Provisions and Policy Issues, 67 Mo L.Rev. 143, 186 (2002). This rise in popularity owes largely to the benefits revocable trusts offer over wills, the most significant of which is the avoidance of probate. See S. Alan Medlin, The Impact of Significant Substantive Provisions of the South Carolina Trust Code, 57 S.C. L.Rev. 137, 140-41 (2005).
. Language is "express" when it is "directly stated." Brack's Law Dictionary 661 (Oth ed.2009). See also id. (defining "expressed" as "IdJeclared in direct terms; stated in words; not left to inference or implication").
