OPINION
¶ 1 Appellants, Jalal Ansari and Shawn Lagaña, challenge their convictions of enticing a minor over the Internet in violation of the prior version of Utah Code section 76-4-401 (2003) (amended 2003). We affirm.
BACKGROUND
¶ 2 On September 30, 2002, police charged Ansari, a Utah resident, with enticing a minor over the Internet after he had allegedly used an Internet chat room to contact an undercover police officer posing as a thirteen-year-old girl. The sexually suggestive conversation concluded with an agreement to meet that night at a park in Utah. Ansari was arrested when he arrived at the agreed location.
¶ 3 Lagaña, also a Utah resident, was charged separately on April 14, 2003 for the same offense stemming from essentially identical circumstances. All of his relevant conduct also occurred in Utah.
¶ 4 Ansari and Lagaña both moved to dismiss the charges on grounds that the Utah Internet enticement statute, Utah Code section 76-4-401, is unconstitutional. The trial court denied their motions, and both Ansaii and Lagaña entered conditional guilty pleas pending the outcome of this appeal.
ISSUES AND STANDARD OF REVIEW
¶ 5 On appeal, Ansari and Lagaña challenge the prior enactment of the Utah Internet enticement statute on grounds that it includes fatally inconsistent terms, imposes an undue burden on interstate commerce in violation of the Commerce Clause, and is void for vagueness. “Constitutional challenges to statutes present questions of law, which we review for correctness.”
Provo City Corp. v. Thompson,
ANALYSIS
¶ 6 At the time in question, the Internet enticement statute, Utah Code section 76-4-401 read as follows:
*235 (1) A person commits enticement of a minor over the Internet when not amounting to an attempt, conspiracy, or solicitation under Section 76-4-101, 76-4-201, or 76-4-203, the person knowingly uses a computer to solicit, seduce, lure, or entice, or attempts to solicit, seduce, lure, or entice a minor or a person the defendant believes to be a minor to engage in any sexual activity which is a violation of state criminal law.
(2) It is not a defense to the crime of enticing a minor under Subsection (1), or an attempt to commit this offense, that a law enforcement officer or an undercover operative who is working with a law enforcement agency was involved in the detection or investigation of the offense.
(3) An enticement of a minor under Subsection (1) with the intent to commit:
(a) a first degree felony is a second degree felony;
(b) a second degree felony is a third degree felony;
(c) a third degree felony is a class A misdemeanor;
(d) a class A misdemeanor is a class B misdemeanor; and
(e) a class B misdemeanor is a class C misdemeanor.
Utah Code Ann. § 76-4-401 (2003). After Ansari and Lagaña were charged, section 76-4-401 was amended in 2003 to remove the phrase “not amounting to an attempt, conspiracy, or solicitation under Section 76-4-101, 76-4-201, or 76-4-203.” See Utah Code Ann. § 76-4-401(1) (Supp.2003) (amendment effective May 5, 2003).
I. Inconsistent Terms
¶7 Ansari and Lagaña first challenge the Utah Internet enticement statute on grounds that its terms are fatally inconsistent and thereby unconstitutional. 1 They take issue with the clause from subsection (1), which provides that the statute applies to conduct “not amounting to an attempt, conspiracy, or solicitation under Section 76-4-101, 76-4-201, or 76-4-203.” Utah Code Ann. § 76-4-401(1).
¶ 8 Their argument proceeds in two steps. They argue first that the only natural reading of “not amounting to” requires the State to affirmatively prove absence of attempt, conspiracy, or solicitation. Second, when “not amounting to” is read to require the State to disprove attempt, conspiracy, and solicitation, this requirement is fatally inconsistent with the statute’s requirement that the State also prove the defendant “use[d] a computer to solicit, seduce, lure, or entice a minor.” Id. In other words, they argue that the only natural reading of the statute requires the State to both prove and disprove the same elements.
¶ 9 We determine as an initial matter that Ansari and Lagaña have standing to make this challenge because, if accepted, their reading of the statute would “establish that no set of circumstances exists under which the [statute] would be valid.”
State v. Herrera,
¶ 10 First, we hold that the “not amounting to” clause does not require the State to affirmatively prove absence of attempt, conspiracy, and solicitation. “It is a basic principle that legislative enactments are endowed with a strong presumption of validity.”
State v. Mohi,
¶ 11 Ansari and Lagaña prevail only if they prove that their reading of the “not amounting clause” is the only reasonable reading. We determine it is not and rely on an alternative construction. The “not amounting to” clause can reasonably be understood to indicate the role of section 76-4-401 as an alternative to attempt, conspiracy, and solicitation, and not to require the State to first prove the absence of these crimes.
¶ 12 This reading not only avoids any unconstitutional inconsistency, but it accords with the likely purposes of the statute. In drafting section 76-4-401, the legislature was likely aware that the “not amounting to” clause has been used in other rape and attempted rape crimes and that Utah courts have consistently interpreted the clause to not require the State to affirmatively disprove other crimes.
See State v. Reed,
¶ 13 In addition, the legislature was probably aware that the “not amounting to” clause would assist in preventing a challenge under
State v. Shondel,
*237 ¶ 14 Second, even if we were to determine that the only reasonable reading of the statute required the State to affirmatively disprove attempt, conspiracy, and solicitation, we would still conclude that section 76-4-401 does not require the State to prove and disprove the same elements. Ansari and La-gaña claim that the crimes of attempt, conspiracy, and solicitation are essentially the same as Internet enticement. We disagree and conclude that there are in fact substantial differences.
¶ 15 As a prefatory matter, we note that it is rare that a statute’s terms are found to be fatally inconsistent. Ansari and Lagaña refer us to one case,
Nelson v. Salt Lake County,
in which the supreme court held the terms of a statute invalid because it was “patently inconsistent” and “so flawed that it is entirely inoperable.”
¶ 16 Ansari and Lagaña ask us to draw a parallel with Nelson here, but we refuse based on our determination that the elements and penalties of Internet enticement differ significantly from the inchoate crimes of attempt, conspiracy, and solicitation. Moreover, unlike Nelson, the statutory scheme taken as a whole is reasonable in light of the State’s interest in punishing inchoate crimes more severely as they near consummation.
¶ 17 We turn first to the differences between Internet enticement and other inchoate crimes. The most notable difference is that attempt, conspiracy, and solicitation impose a higher evidentiary burden on the State. The crime of attempt requires a proof of a “substantial step towards the commission of the offense” that is “strongly corroborative of the actor’s mental state.” Utah Code Ann. 76-4-101(l)-(2) (Supp.2004). 4 Similarly, criminal solicitation requires the solicitation to be made “under circumstances strongly corroborative of the actor’s intent that the offense be committed.” Id. § 7G-i- 203(2) (2003). Conspiracy also requires an “overt act in pursuance of the conspiracy.” Id. § 76-4-201 (2003). In contrast, section 76-4-401 does not require “overt” or “strongly corroborative evidence.” See id. § 76-4-401(1).
¶ 18 The second major difference is that attempt, conspiracy, and solicitation impose a more severe penalty. An attempt or conspiracy with the intent to commit a sex offense on a child is a first degree felony. See id. §§ 76-4-102(2)(c), -202(2). A solicitation to commit a sex offense on a child is a second degree felony. See id. § 76-4-204(2) (2003). In contrast, section 76-4-401 is scaled in all cases to impose a penalty one degree lower than the intended crime. See id. § 76-4-401(3).
¶ 19 Finally, the reason for these differences must be understood in the context of the State’s statutory scheme imposing higher penalties the nearer a defendant arrives at completing the underlying crime. For example, the crime of Internet enticement would be more appropriate in a case where, as here, a defendant solicits sex from an undercover police officer on the Internet believing he is communicating with a minor. In such a case, attempt, conspiracy, and solicitation may be *238 difficult to prove because the State must establish the defendant’s actions are “strongly corroborative” of an intent to commit a felony or involve an “overt act.” See id. §§ 76-4-101, -201, -203. The charge of Internet enticement would be more appropriate because it does not require “strong corroboration” of intent. See id. § 76-4-401.
¶20 In contrast, the defendant may contact a minor via the Internet, meet the minor, and be on the verge of consummating a felonious sexual act with the minor before being stopped by police. In that case, the higher crime of attempt, for example, would be appropriate because the State could probably prove “strong corroboration” of an intent to commit the underlying felony.
¶21 In sum, we conclude that although Internet enticement and other inchoate crimes may interlock, they do so in a way that allows the State to prosecute efforts to seduce children at different stages. If the predator is caught early in his effort, the State may charge Internet enticement, and if caught after the crime had developed, the State may have evidence to charge the greater crimes of attempt, conspiracy, and solicitation. Thus, the Internet enticement statute is not “patently inconsistent” nor “so flawed that it is entirely inoperable.”
Nelson v. Salt Lake County,
¶22 Thus, we read the plain language of section 76-4-401 to not require the State to affirmatively disprove attempt, conspiracy, and solicitation. Even if we were to adopt Ansari and Lagana’s reading, we see no “patent inconsistency” because the elements and penalties of section 76-4^401 are distinct from those of attempt, conspiracy, and solicitation. Accordingly, we reject Ansari and Lagana’s challenge.
II. Commerce Clause
¶23 Ansari and Lagaña next argue that the Utah Internet enticement statute violates the Commerce Clause by imposing an undue burden on interstate commerce. Congress has plenary power to regulate interstate commerce and, even in the absence of federal action, courts have determined that a “negative or dormant implication of the Commerce Clause prohibits state ... regulation ... that discriminates against or unduly burdens interstate commerce and thereby ‘imped[es] free private trade in the national marketplace.’ ”
General Motors Corp. v. Tracy,
¶ 24 Ansari and Lagaña claim the Utah Internet enticement statute is invalid under the Dormant Commerce Clause because it “unconstitutionally governs conduct occurring wholly outside the State of Utah” and because the Internet, “by its unique nature,” is within the exclusive domain of the federal government. In other words, Ansari and Lagaña alert us to the possibility that, for example, a Nevada resident could use the Internet to solicit sex from a minor he thought to be a resident of Nevada, but in reality, is a resident of Utah. Thus, this argument concludes that the statute allows Utah to regulate activities occurring in Nevada and, by allowing a state to regulate the Internet, subjects Internet users everywhere to conflicting regulations.
¶ 25 Before considering the substance of this challenge we must determine whether Ansari and Lagaña have standing to assert the rights of nonresidents who may be affected by the statute. Although the issue of standing was not raised in the lower court, we may address it sua sponte.
See, e.g., Washington County Water Consewancy Dist. v. Morgan,
¶26 Our consideration of standing comprises three steps. We must first determine the type of challenge Ansari and Lagaña assert: whether they challenge the constitutionality of the statute on its face or as it is applied to the particular facts of their case. Second, we must determine whether they have standing to assert that particular type of challenge. Finally, if we determine that they have standing, we consider the substance of their challenge.
A. Nature of the Constitutional Challenge
¶ 27 A statute can be “unconstitutional either on its face or as applied to the facts of a given case.”
State v. Herrera,
¶ 28 We may safely conclude that Ansari and Lagaña assert a facial challenge because they do not brief an “as-applied” issue, nor could they, because neither was injured as an out-of-state participant in Interstate commerce. Both are in fact residents of Utah and their conduct occurred wholly in Utah. They sent their messages from a Utah location to a Utah recipient and planned to meet the intended victims in Utah locations. Hence, their challenge is a facial one because they are Utah residents seeking to “vindicate not only [their] own rights, but those of others who may also be adversely impacted by the statute,” namely residents of other states.
Morales,
B. Standing to Assert a Facial Challenge
¶ 29 We next determine that An-sari and Lagaña do not have standing to assert their facial Commerce Clause challenge. We note at the outset that the question of standing here is governed by state and not federal standing rules.
See Provo City Corp. v. Willden,
¶ 30 Nevertheless, in deciding whether An-sari and Lagaña have standing based on the potential injury to out-of-state Internet users, we take guidance first from the recent Supreme Court holding in
Sabri v. United States,
which provides a stern reminder that “facial challenges are best when infrequent.” — U.S. --,-,
¶ 31 The Court identified two dangers posed by wholesale' facial challenges to stat
*240
utes and cautioned courts to adopt a “skeptical approach” to such challenges.
Id.
First, “[f]acial adjudication carries too much promise of ‘premature interpretatio[n] of statutes’ on the basis of factually bare-bones records.”
Id.
(quoting
United States v. Raines,
¶ 32 The Utah Supreme Court has also recognized the dangers implicit in facial challenges to the constitutionality of criminal statutes. In
State v. Mace,
the court refused to reach a defendant’s substantive challenge to the constitutionality of a statute because he merely asserted the rights of hypothetical defendants.
See
¶33 In that case, Aaron Mace entered a woman’s apartment on the pretense of warning her that someone was “tampering with her car.” Id. at 1374. After asking to use the bathroom, he emerged “wearing rubber gloves and holding a knife and a roll of duct tape,” tied the woman’s hands, raped her, and drove her to her bank where he forced her to withdraw $100 for him. Id. Mace asserted an insanity defense based on an “ego dystonic form of obsessive compulsive paraphilia,” which caused in him a “compulsive, uncontrollable need to have sexual intercourse, even though [he] does not want to do so.” Id. at 1374-75. Nonetheless, he was convicted based on the fact that the Utah insanity defense scheme still allows conviction when the requisite mens rea is present even though the defendant may not fully appreciate the wrongfulness of the conduct or is unable to control it. See id. at 1376.
¶ 34 Mace challenged his conviction on the grounds that the Utah insanity defense scheme permitted cruel and unusual punishment and, therefore, facially invalid under the Eight Amendment. See id. at 1374-79. In response, the court utilized a three-step analysis to determine that the defendant did not have standing to assert his facial challenge. See id. at 1379.
¶ 35 The court explained that in reviewing standing to assert a facial challenge it would first consider whether the defendant had a “personal stake in the controversy” and not “ ‘[a] mere allegation of an adverse impact.’ ”
Id.
(quoting
Jenkins v. Swan,
¶ 36 The court concluded that Mace met none of these criteria. See id. Under the first step, the court concluded that “Mace has no personal stake in his claim that the statutory scheme might punish people who are unable to appreciate the wrongfulness of their conduct” because “[a]s the facts indicate, Mace did appreciate the wrongfulness of his conduct.” Id. Under the second step, the court concluded that “there are more appropriate litigants to pursue Mace’s claim, namely, those individuals whose rights Mace *241 seeks to assert: those whose mental illness made it impossible for them to appreciate the wrongfulness of their conduct.” Id. Finally, the court concluded that the issue was not of sufficient public importance because “[e]ven if the statutory scheme is susceptible to unconstitutional application, it is more appropriate for us to await a litigant who may actually be harmed by such application. Deciding the issue now would have no conceivable concrete benefit to anyone.” Id.
¶ 37 In turning now to the facial Commerce Clause challenge made by Ansari and Lagaña, we note at the outset that their challenge triggers many of the concerns addressed by the United States Supreme Court in
Sabri v. United States.
We share that Court’s concern that Ansari and Lagana’s facial challenge “carries too much promise of premature interpretatio[n] of [the] statute[] on the basis of [a] factually bare-bones record[ ].” — U.S.-,-,
¶ 38 Similarly, like the Sabri Court, we are wary that this challenge amounts to nothing more than an “overbreadth challenge” in which Ansari and Lagaña merely claim “that the statute could not be enforced against [them], because it could not be enforced against someone else whose behavior would be outside the scope of [Utah]’s ... authority to legislate.” Id. Here, Ansari and Lagaña were not injured by any unlawful restraint on interstate commerce; yet they claim to assert the lights of those that might be. Though cloaked in terms of the Commerce Clause, we conclude, as the Sabri Court, that the challenge amounts to nothing more than a mere assertion that the statute is overboard and may impose unintended effects on unintended parties. Such an assertion, even if it were to have a solid constitutional basis, would be best raised by out-of-state Internet users injured in fact by the Utah statute. Given that Ansari and Lagaña assert borrowed constitutional rights and due to then-limited ability to provide first-hand testimony regarding the out-of-state effects of the Utah statute, we view this facial challenge with a high degree of skepticism.
¶ 39 Our skepticism is confirmed by applying the Utah standing analysis outlined in
Mace,
¶ 40 We next consider whether Ansari and Lagaña could have standing to assert the rights of others on grounds that there is no challenger with “a more direct interest in the issues who can more adequately litigate the issues.” Id. (quotations and citation omitted). We have already answered this query in the first step of the analysis: Ansari and Lagaña assert the rights of out-of-state Internet users harmed by the Utah statute, and, if they exist, they would surely have “a more direct interest in the issues” and able to “more adequately litigate the issues.” Id. (quotations and citations omitted). Thus, like the Mace court, we conclude that “there are more appropriate litigants to pursue [their] claim,” namely, residents of other states who are injured in fact by the Utah statute. Id.
¶ 41 Finally, under the Mace analysis, An-sari and Lagaña may have standing if we determine that “the issues raised by [them] are of sufficient public importance in and of themselves to grant ... standing.” Id. We have already discussed our suspicion that this challenge amounts to nothing more than an overbreadth challenge cloaked as a constitutional issue. Ansari and Lagaña allege injury in the abstract and, without reifying facts to indicate such injury actually exists and is widespread, we refuse to consider it an important public concern. Regardless, we agree with the Mace court that “[even if the statutory scheme is susceptible to unconstitu *242 tional application, it is more appropriate for us to await a litigant who may actually be harmed by such application.]” Id. Accordingly, we decline to review their Dormant Commerce Clause challenge and await a more appropriate representative of the concerns raised.
III. Vagueness
¶ 42 Finally, Ansari and Lagaña challenge section 76-4-401 as unconstitutionally vague. A statute is impermissibly vague if it either (a) “fails to provide people of ordinary intelligence a reasonable opportunity to understand what conduct it prohibits” or (b) “authorizes or even encourages arbitrary and discriminatory enforcement.”
Hill v. Colorado,
¶ 43 Ansari and Lagaña argue that section 76-4-401 does not provide a person of ordinary intelligence a reasonable opportunity to understand what conduct is prohibited. They also argue that the statute’s imprecise terms permits discretionary enforcement. Since we have already determined that section 76-4-401 contains no fatal internal inconsistencies, both of these arguments must rely on the determination that the statute’s terms are impermissibly uncertain.
¶ 44 We hold that Ansari and Laga-ña do not have standing to challenge the vagueness of the Internet enticement statute. It is well-understood that in order to establish standing to challenge vagueness, a defendant has the burden of proving the statute is “ ’impermissibly vague in all of its applications.’ ”
MacGuire,
¶45 In the present case, Ansari and Lagaña cannot claim the statute is vague “in all of its applications” because their conduct is “clearly proscribed” by the statute. Id. Indeed, their efforts to contact a thirteen-year-old girl to engage in sexual activities is the quintessence of “seducfing], lur[ing], or entic[ing]” a minor. Utah Code Ann. § 76-4-401. Given that Ansari and Lagaña raise no uncertainty regarding the statute’s proscription of their conduct, we refuse their invitation to conjure conditions under which the statute could be vague. Accordingly, we need not arrive at the substance of their challenge. 6
CONCLUSION
¶ 46 Having determined that the terms of section 76-4-401 are not fatally inconsistent and that Ansari and Lagaña do not have standing to assert their Commerce Clause and vagueness challenges, we affirm.
Notes
. The State objects to this challenge on grounds that the constitutional effect of inconsistent terms was not properly preserved at trial. “In order to preserve an issue for appeal, it 'must be raised in a timely fashion, must be specifically raised such that the issue is sufficiently raised to a level of consciousness before the trial court, and must be supported by evidence or relevant legal authority.' "
State v. Richins,
.
See, e.g., Masich v. U.S. Smelting, Ref., & Mining Co.,
. For example, in a case where a defendant uses the Internet to contact a minor and, upon meeting the child, is on the verge of engaging in sexual intercourse when the police arrive, the State would likely prefer to charge the defendant with attempted statutory rape rather than Internet enticement. However, under Shondel, the defendant could claim that the elements of attempted statutory rape and Internet enticement are similar and should only be punished according to the lesser crime, Internet enticement, a second degree felony. The "not amounting to” *237 clause imbedded in the Internet enticement statute avoids this result by indicating that if the defendant's acts "amount to” attempt to commit statutory rape, then Internet enticement does not act as a lesser crime under the Shondel analysis.
Recent interpretations of
Shondel
have limited its holding to statutes with "identical elements,”
State v. Fedorowicz,
. The version of the attempt statute in force in 2002 required evidence “strongly corroborative of the actor’s intent to commit the offense." Utah Code Ann. § 76-4-101 (2003) (amended 2004).
. Specifically, the defendant claimed that the statute was outside Congress's Commerce Clause power because it did not require the government to prove a connection between the alleged bribe money involved and federal funds provided to the state.
See Sabri v. United States,
- U.S. -, -,
.
Even if they were to have standing, we would reject the substance of their challenge. In reviewing for vagueness, we "presume! ] that the statute is valid, and ... resolve any reasonable doubts in favor of constitutionality.”
State v. Morrison,
