Opinion by Judge TASHIMA; Concurrence by Judge McKEOWN.
OPINION
TASHIMA, Circuit Judge:In 2011, the Arizona Legislature enacted a law requiring the voter registration form distributed by the Arizona Secretary of State to list the two largest parties (as measured by number of registered voters) on the form, as well as provide a blank line for “other party preferences.” The Arizona Green Party, Arizona Libertarian Party, and three of their members (together, “Plaintiffs”) brought this action, alleging that the new voter registration form violated their First and Fourteenth Amendment rights. The district court concluded that the amended voter registration form survived constitutional scrutiny and granted the State’s motion for summary judgment. We have jurisdiction under 28 U.S.C. § 1291, and we affirm.
I.
A. Section 16-152(A)(5) and the Registration Form
In 2011, the Arizona Legislature amended the statute that dictates the content of the voter registration form provided by the State (the “Registration Form”). See 2011 Ariz. Legis. Serv. Ch. 389 § 1 (West) (codified at Ariz.Rev.Stat. § 16-152(A)). The amended statute provides, in relevant part:
A. The form used for registration of electors ghall contain.
5. The registrant’s party preference. The two largest political parties that are entitled to continued representation on the ballot shall be listed on the form in the order determined by calculating which party has the highest number of registered voters at the close of registration for the most recent general election for governor, then the second highest. The form shall allow the registrant to circle, check or otherwise mark the party preference and shall include a blank line for other party preference options.
Ariz.Rev.Stat. § 16-152(A)(5). Prior to the 2011 amendment, Arizona law required only that voter registration forms include a blank space for “[t]he registrant’s party preference.” See Ariz.Rev.Stat. § 16-152(A)(5) (2010). As of January 1, 2011, the two parties with the highest number of registered voters in Arizona were the Republican Party, with approximately 35.8 percent, and the Democratic Party, with approximately 31.6 percent. The next largest party was the Libertarian Party, with approximately 0.78 percent of registered voters.1
In response to the amendment, the Arizona Secretary of State revised box 14 on the Registration Form. In its current form, box 14 appears as follows:
*727[[Image here]]
The blank line under the “Other” checkbox is approximately 0.9 inch long. The Registration Form also provides the following instructions regarding box 14:
Fill in your political party preference in box 14. If you leave this box blank as a first time registrant in your county, your party preference will be “Party Not Designated.” If you leave this box blank and you are already registered in the county, your current party preference will be retained. Please write full name of party preference in box.
B. Arizona’s Voter Registration Scheme
Under Arizona law, qualified electors2 may register to vote in one of three ways:
1.They may obtain, fill out, and mail in the Registration Form, which can be downloaded from the Secretary of State’s website or picked up from either the Secretary of State’s office or any local county recorder’s office, see Ariz.Rev.Stat. § 16-151;
2. They may submit an online voter registration application using the “EZ Voter Registration” process, available at the Arizona Department of Transportation’s service website, see Ariz.Rev.Stat. § 16-112(B)(4); see also Ariz. Dep’t of Transp. Motor Vehicle Div., Service Arizona, http://www.servicearizona.com (last visited Jan. 7, 2015);3 or,
3. They may register in person at Arizona Motor Vehicle Division offices by filling out a section provided on the form for a driver’s license or renewal for individuals who want to register to vote.
Section 16-152(A)(5) applies only to the first of these three options — that is, only the Secretary of State is required to provide checkboxes for the two largest parties on the Registration Form.' See Ariz.Rev. Stat. § 16-152(E) (providing that the content regulations set forth in § 16-152(A) “do[] not apply to registrations received from the department of transportation”). Like the Secretary of State’s form before the amendment to § 16-152(A)(5), the second and third options allow a registrant to indicate party preference by entering any party’s name, including a major party.4
*728C. Arizona’s Ballot Access Laws
Under Arizona law, there are two ways for a party to get its preferred candidate on the ballot.5 First, a “new political party” becomes “eligible for recognition” upon filing a petition with the Secretary of State signed by a number of qualified electors equal to one and one-third (1 ]é) percent “of the total votes cast for governor at the last preceding general election at which a governor was elected.” Ariz.Rev.Stat. § 16-801(A). Recognition entitles a new political party to be “represented by an official party ballot at the primary election and accorded a ballot column at the succeeding general election” through at least “the next two regularly scheduled general elections for federal office immediately following recognition of the political party.” Ariz.Rev.Stat. § 16-801(B).
After these first two federal election cycles, a party may continue to be represented by an official party ballot during a primary election and accorded a ballot column in the succeeding general election (that is, the party is entitled to “continuing ballot access”) in one of two ways. First, a party is entitled to continuing ballot access if its candidate receives “not less than five per cent of the total votes cast for governor or presidential electors” at the “last preceding general election” for certain specified offices. Ariz.Rev.Stat. § 16-804(A). Second, a party is entitled to continuing ballot access if, on certain dates prescribed by statute, the party “has registered electors in the party equal to at least two-thirds of one per cent of the total registered electors in such jurisdiction.” Ariz.Rev.Stat. § 16-804(B). A party that loses continuing ballot access may get it back the same way a new party would gain access to the ballot: it must submit another petition signed by a number of qualified electors equal to one and one-third (1 lk) percent of the total votes cast for governor at the last preceding general election at which a governor was elected. See Ariz. Rev.Stat. § 16-801(B).
When Plaintiffs filed their complaint, five parties had continuing ballot access: Republican, Democratic, Green, Libertarian, and Americans Elect. During the pendency of this appeal, the Arizona Green Party lost its continuing ballot access.6
D. Procedural History
Plaintiffs’ complaint, filed against defendant Ken Bennett, as Arizona Secretary of State, alleges that § 16-152(A)(5) violated their' First and Fourteenth Amendment rights. Plaintiffs sought an order from the district court enjoining the State from issuing voter registration forms that failed to “treat equally the four parties with Statewide continuing ballot access.” On the parties’ cross-motions for summary judgment, the district court denied Plaintiffs’ motion and granted the State’s motion. Plaintiffs timely appeal.
II.
This Court reviews the constitutionality of a statute de novo. See Chamness v. Bowen, 722 F.3d 1110, 1116 (9th Cir.2013).
III.
A. The Framework for Resolving Constitutional Challenges to State Election Laws
“Restrictions on voting can burden equal protection rights as well as ‘in*729terwoven strands of liberty protected by the First and Fourteenth Amendments— namely, the ‘right of individuals to associate for the advancement of political beliefs, and the right of qualified voters, regardless of their political persuasion, to cast their votes effectively.’ ” Dudum, 640 F.3d at 1105-06 (quoting Anderson v. Celebrezze, 460 U.S. 780, 787, 103 S.Ct. 1564, 75 L.Ed.2d 547 (1983) (some internal quotation marks omitted)).7 As the Supreme Court has recognized, these rights are generally guaranteed by ensuring that political parties, including those that are new to the political scene, are given the opportunity to place their candidate on the ballot. See Ill. State Bd. of Elections v. Socialist Workers Party, 440 U.S. 173, 184, 99 S.Ct. 983, 59 L.Ed.2d 230 (1979) (“The freedom to associate as a political party ... has diminished practical value if the party can be kept off the ballot.”). Indeed, because “an election campaign is an effective platform for the expression of views on the issues of the day, and a candidate serves • as a rallying-point for like-minded citizens,” Anderson, 460 U.S. at 788, 103 S.Ct. 1564 “the right to vote is heavily burdened if that vote may be cast only for one of two parties at a time when other parties are clamoring for a place on the ballot.” Williams v. Rhodes, 393 U.S. 23, 31, 89 S.Ct. 5, 21 L.Ed.2d 24 (1968).
“At the same time,” however, “ ‘States retain the power to regulate their own elections.’ ” Dudum, 640 F.3d at 1106 (quoting Burdick v. Takushi, 504 U.S. 428, 433, 112 S.Ct. 2059, 119 L.Ed.2d 245 (1992)). “Common sense, as well as constitutional law, compels the conclusion that government must play an active role in structuring elections.” Id. at 1103 (quoting Burdick, 504 U.S at 433, 112 S.Ct. 2059). The Constitution itself “provides that ■ States may prescribe ‘the Times, Places and Manner of holding Elections for Senators and Representatives.’ ” Bur-dick, 504 U.S. at 433, 112 S.Ct. 2059 (quoting U.S. Const, art. I, § 4, cl. 1 (brackets omitted)). And, “[t]o achieve these necessary objectives, States have enacted comprehensive and sometimes complex election codes.” Anderson, 460 U.S. at 788, 103 S.Ct. 1564. Moreover, every law regulating elections, “whether it governs the registration and qualifications of voters, the selection and eligibility of candidates, or the voting process itself, inevitably affects — at least to some degree — the individual’s right to vote and his right to associate with others for political ends.” Id.
Thus, in order to “resolve the tension between a [party’s] First Amendment rights and the state’s interest in preserving the fairness and integrity of the voting process,” the “Supreme Court developed a balancing test.” Rubin v. City of Santa Monica, 308 F.3d 1008, 1014 (9th Cir.2002). “In considering a constitutional challenge to an election law, we must weigh the character and magnitude of the asserted injury to the rights protected by the First and Fourteenth Amendments against the precise interests put forward by the State as justifications for the burden imposed by its rule.” Nader v. Cronin, 620 F.3d 1214, 1217 (9th Cir.2010) (per curiam) (internal quotation marks omitted).
Accordingly, “the severity of the burden the election law imposes on the plaintiffs rights dictates the level of scrutiny applied by the court.” Id. (quoting *730Nader v. Brewer, 531 F.3d 1028, 1034 (9th Cir.2008) (internal quotation marks omitted)); see also Burdick, 504 U.S. at 434, 112 S.Ct. 2059 (“[T]he rigorousness of our inquiry into the propriety of a state election law depends upon the extent to which a challenged regulation burdens First and Fourteenth Amendment rights.”). “An election regulation that imposes a severe burden is subject to strict scrutiny and will be upheld only if it is narrowly tailored to serve a compelling state interest.” Cronin, 620 F.3d at 1217 (quoting Brewer, 531 F.3d at 1035 (internal quotation marks and brackets omitted)). By contrast, “[a] state may justify election regulations imposing a lesser burden by demonstrating the state has ‘important regulatory interests.’ ” Id. (quoting Brewer, 531 F.3d at 1035).
B. Section 16-152(A) Imposes a De Minimis Burden on Plaintiffs’ Constitutional Rights
In cases “previously examining differing treatments of minor and major political parties,” we have held that, “in determining the nature and magnitude of the burden that the state’s election procedures impose on the minor party, we must examine the entire scheme regulating ballot access.” Cronin, 620 F.3d at 1217 (quoting Libertarian Party of Wash. v. Munro, 31 F.3d 759, 761-62 (9th Cir.1994) (internal quotation marks and brackets omitted)).8 The relevant inquiry “is whether ‘reasonably diligent’ minor party candidates can normally gain a place on the ballot, or if instead they only rarely will succeed.” Munro, 31 F.3d at 762 (quoting Storer v. Brown, 415 U.S. 724, 742, 94 S.Ct. 1274, 39 L.Ed.2d 714 (1974)); see also Anderson, 460 U.S. at 787-88, 103 S.Ct. 1564 (noting that the relevant inquiry in determining the constitutionality of election regulations is the ability of voters’ preferred candidates to get on the ballot). Moreover, the party challenging the law bears “the initial burden of showing that [the state’s] ballot access requirements seriously restrict the availability of political opportunity.” Munro, 31 F.3d at 762.
Plaintiffs have failed to make any such showing. Section 16-152(A)(5) does not directly inhibit the ability of any party to gain access to the ballot, nor does it articulate different criteria for major and minor parties who seek to get their candidates on the ballot. All new political parties (and parties that have lost continuing ballot access) are required to comply with the same criteria to get their candidate on the ballot. See Ariz.Rev.Stat. § 16-801. Moreover, all political parties, major and minor alike, are entitled to continuing ballot access if: (1) their candidates garner at least five percent of the “total votes cast for governor or presidential electors” at the “last *731preceding general election” for certain specified offices; or, (2) they have “registered electors ... equal to at least two-thirds of one per cent of the total registered electors” in the relevant jurisdiction by a specified date. Ariz.Rev.Stat. § 16-804.
Acknowledging that § 16 — 152(A)(5) does not directly burden their ability to get their preferred candidate on the ballot, Plaintiffs instead assert that the statute indirectly “restricts] the availability of political opportunity,” Munro, 31 F.3d at 762, by encouraging voters to register with the two major parties over all others. This encouragement, Plaintiffs contend, affects their ability to get their preferred candidate on the ballot, because continuing ballot access is linked (at least partially) to the number of voters who are registered with the party.
Plaintiffs have failed, however, to adduce any evidence that § 16-152(A)(5) actually encourages individuals to register for major parties instead of minor ones. As an initial matter, Plaintiffs have failed to show how many new voters actually use the Registration Form to register, as opposed to using one of the other three alternative means, which do not require use of the Registration Form. Without some assessment of how many voters actually use the Registration Form, we cannot even begin to gauge the impact it may have had on party registration rolls.
Moreover, even if we were to assume that a significant number of voters used the Registration Form, Plaintiffs failed to adduce any evidence — statistical, anecdotal, or otherwise — that the Registration Form has, in fact, encouraged voters to register for the major parties over minor ones. Plaintiffs suggest that the Registration Form discourages voters from registering with minor parties by sending “a message to the future voter” that there are only “two [real ] political parties in this State,” and that “[registering for any other party is a show of eccentricity” that must be “grudgingly tolerate[d].” However, Plaintiffs failed to introduce even an iota of evidence in support of this assertion. The alleged psychological effects that the Registration Form has on registering voters is sheer speculation.9 Plaintiffs’ other contention — that voters have been unable to register with the party of their choosing because the blank line below the word “Other” in box 14 is “too short to contain even the word ‘Libertarian’ ” — is similarly unsupported by any evidence in the record.
In sum, by failing to adduce evidence that the Registration Form actually discourages or prevents voters from registering with minor parties, Plaintiffs have failed to meet their “initial burden of showing that [Arizona’s] ballot access requirements seriously restrict the availability of political opportunity.” Munro, 31 F.3d at 762. At most, § 16-152(A)(5) imposes a de minimis burden on Plaintiffs’ First and Fourteenth Amendment rights.
*732C. Section 16~152(A)(5) is Rationally Related to a Legitimate State Interest
Where, as here, a state election law imposes only a de minimis burden on a party’s First and Fourteenth Amendment rights, the State “need demonstrate only that [the statute at issue] is rationally related to a legitimate state interest.” Cronin, 620 F.3d at 1218 (quoting Munro, 31 F.3d at 763 (internal quotation marks omitted)).10 In evaluating the constitutionality of such statutes, we may “look to any conceivable interest promoted by the challenged procedures, whether or not the state cited that interest in its briefs or in the district court.” Munro, 31 F.3d at 763; see also Dudum, 640 F.3d at 1116 n. 28 (noting that, in sustaining an election law that did not impose a severe burden on constitutional rights, the Supreme Court in Timmons v. Twin Cities Area New Party, 520 U.S. 351, 117 S.Ct. 1364, 137 L.Ed.2d 589 (1997), “expressly relied on a state interest admittedly not advanced in its briefs, but mentioned during oral argument”). Furthermore, we need not determine whether the interests served by § 16-152(A)(5) can be better served by other means: as we recently concluded, “when a challenged rule imposes only limited burdens on the right to vote, there is no requirement that the rule is the only or the best way to further the proffered interests.” Dudum, 640 F.3d at 1114.11 Finally, where, as here, the regulation at issue imposes only a slight burden on a party’s constitutional rights, that party “bear[s] the burden of demonstrating that the regulations [it] attack[s] have no legitimate rational basis.” Munro, 31 F.3d at 763.12
Plaintiffs have failed to meet their burden. Section 16-152(A)(5) is ra*733tionally related to Arizona’s legitimate interest in ensuring that election official correctly register voters as members of parties of their choosing. By providing checkboxes for the two largest political parties, the Registration Form reduces the potential that an election official will incorrectly register a voter who wishes to affiliate with one of the state’s two most prominent parties. Because the overwhelming majority of Arizona voters are registered with one of the two major parties, the checkbox method ensures that most voters will be able to participate in the primary election of their choosing. See Ariz.Rev.Stat. § 16-467 (providing that, in primary elections, voters who are registered as a member of a political party shall be given “one ballot only of the party with which the voter is affiliated”). Ensuring that voters are able to participate in their preferred party’s primary election is, at the very least, a legitimate state interest. See Kusper v. Pontikes, 414 U.S. 51, 58, 94 S.Ct. 303, 38 L.Ed.2d 260 (1973) (“Under our political system, a basic function of a political party is to select the candidates for public office to be offered to the voters at general elections. A prime objective of most voters in associating themselves with a particular party must surely be to gain a voice in that selection process.”).
Although election officials also have an interest in correctly registering applicants who wish to associate with smaller political parties,' there are, as the State notes, countervailing concerns about providing check-boxes for smaller political parties that are not present with the two largest parties. For example, smaller political parties lose their status as recognized political parties under Arizona law much more frequently than the major parties do. If Arizona was required to provide checkboxes for all political parties entitled to continuing ballot access, as Plaintiffs suggest, the State would be required to change, and reprint, the Registration Form each time a party lost, or gained, continuing ballot access.13 Thus, § 16-152(A)(5) helps to ensure that election officials will easily be able to determine the preferred party for most of Arizona’s voters in a manner that the State has deemed to be cost efficient and less prone to clerical error. This cost-benefit analysis is the kind of judgment that the Legislature was entitled to make. See Munro, 31 F.3d at 764 (“[B]ecause the current scheme poses only a minuscule burden for minor party candidacies, the Constitution does not require [the state] to adopt a system that is the most efficient possible; it need only- adopt a system that is rationally related to achieving its goals.”); Lemons v. Bradbury, 538 F.3d 1098, 1104 (9th Cir.2008) (upholding Oregon’s system for verifying that individuals who signed a referendum because it reduced the state’s administrative burden); Weber v. Shelley, 347 F.3d 1101, 1106 (9th Cir.2003) (concluding that a state has a legitimate interest in saving money).14
IV.
In sum, we conclude that Plaintiffs have failed to meet their burden of demonstrat*734ing that § 16-152(A)(5) is not rationally-related to a legitimate state interest. Accordingly, the judgment of the district court is
AFFIRMED.
. Although the exact percentage of voters registered with each party has fluctuated slightly since January 1, 2011, the Republican and Democratic Parties have • remained the two parties with the highest number of registered voters.
. Arizona law sets forth certain criteria that make a resident of the state a “qualified elector.” See Ariz.Rev.Stat. §§ 16-101, 16-121.
. We may take judicial notice of “official information posted on a govérnmental website, the accuracy of which [is] undisputed.” Dudum v. Arntz, 640 F.3d 1098, 1101 n. 6 (9th Cir.2011) (citing Daniels-Hall v. Nat'l Educ. Assn, 629 F.3d 992, 998-99 (9th Cir.2010)).
. In addition, "[t]he National Voter Registration Act requires States to 'accept and use’ a uniform federal form to register voters in federal elections.” Arizona v. Inter Tribal Council of Ariz., Inc.,-U.S.-, 133 S.Ct. 2247, 2251, 186 L.Ed.2d 239 (2013). The federal form, like the second and third Arizona options described above, permits a voter to indicate a political party of choice, but does not include checkboxes for the two largest political parties. See U.S. Election Assistance Commission, National Mail Voter Registration Form, http://www.eac.gOv/assets/l/ Documents/Federal% 20Voter% 20Registra-tion_6-25-14_ENG.pdf (last visited Mar. 20, 2015).
. Arizona law also permits individuals who are not members of political parties to qualify for the ballot if they comply with certain criteria. See Ariz.Rev.Stat. § 16-341.
. At oral argument counsel for appellants informed the court that the Green Party has again qualified for continuing ballot access by submitting a petition with a sufficient number of signatures.
. Although Plaintiffs assert both First and Fourteenth Amendment claims, "[t]he Supreme Court has addressed such claims collectively using a single analytic framework.” Dudum, 640 F.3d at 1106 n. 15. Plaintiffs agree that this "single analytic framework” applies here.
. Plaintiffs urge us to forgo a severity-of-the-burden analysis, arguing that, because § 16— 152(A)(5) differentiates between major and minor parties on its face, strict scrutiny automatically applies. Plaintiffs’ proposed bright-line rule is at odds with both Supreme Court precedent and our own. Although the Supreme Court has expressed a generalized concern about laws that favor major parties over minor parties, see, e.g., Anderson, 460 U.S. at 793 n. 16, 103 S.Ct. 1564; Clingman v. Beaver, 544 U.S. 581, 603, 125 S.Ct. 2029, 161 L.Ed.2d 920 (2005) (O'Connor, J., concurring in part and concurring in the judgment), it has only applied strict scrutiny to a state election law after determining that the law imposed a severe burden on a party's constitutional rights. See, e.g., Williams, 393 U.S. at 25 n. 1, 31, 89 S.Ct. 5. Moreover, we have repeatedly refused to apply strict scrutiny to election laws that differentiate between major and minor parties, so long as the law at issue did not “severely burden” a minor party's constitutional rights. See, e.g., Cronin, 620 F.3d at 1217-18; Munro, 31 F.3d at 763. Accordingly, we reject Plaintiffs' contention that strict scrutiny automatically applies to all state election laws that facially distinguish between major and minor parties.
. Both sides make much of a chart compiled by the State that details the number of qualified electors registered with the Republican, Democratic, Green, and Libertarian Parties, as well as an undefined "Other” category, at various points between January 1, 2011, and March 1, 2012. These raw data do not, by themselves, allow us to draw reliable conclusions as to whether the Registration Form actually dissuaded new voters from registering with minor parties. Party registration may ebb hnd flow for myriad reasons, including overall changes in the number of eligible voters, in voter mobilization activity, or in disaffection with the electoral process. Although a study isolating the effects that the Registration Form has had on party registration might allow a fact-finder reasonably to infer that the Registration Form has discouraged voters from registering with minor parties, Plaintiffs have presented no such evidence here.
. Alternatively, we have stated that, in cases in which an election law imposes a de minim-is burden on constitutional rights, the challenged procedures "survive review as long as they further a state's important regulatory interests." Wash. State Republican Party v. Wash. State Grange, 676 F.3d 784, 793-94 (9th Cir.2012) (internal quotation marks omitted) (emphasis added). In this context, we have used the terms "legitimate” interests and "important regulatory” interests interchangeably. See Cronin, 620 F.3d at 1217, 1218; Dudum, 640 F.3d at 1114, 1116.
. Although we have noted that there may be "instances where a burden is not severe enough to warrant strict scrutiny review but is serious enough to require an assessment of whether alternative methods would advance the proffered governmental interests,” Dudum, 640 F.3d at 1114 n. 27, for the reasons set forth above, it is clear that § 16-152(A)(5) does not impose a serious enough burden on Plaintiffs' constitutional rights to mandate this kind of comparative analysis.
. We apply Munro because it is binding on us and addresses situations, like this one, in which the burden, if it exists at all, is vanishingly small. We note, however, that Munro's statements that we may consider hypothetical rationales for a state's election law, and that the plaintiff alleging a de minimis burden must demonstrate the lack of a rational basis, are in tension with some of our other cases and Supreme Court precedent. See, e.g., Bur-dick, 504 U.S. at 434, 112 S.Ct. 2059; Dudum, 640 F.3d at 1106, 1113-14. We need not resolve that tension, however, because even under the balancing of interests and burdens analysis, we would nonetheless reject this challenge. First, as noted above, Plaintiffs failed to adduce evidence of any burden at all; absent any burden, there is no reason to call on the State to justify its practice. At most, Plaintiffs established a' burden on those wishing to register with a third party, limited to writing a word rather than checking a box — assuredly not an infringement of constitutional dimension. Second, the State's rationale, which we below hold justifies this law, is not hypothetical or manufactured by the court, having been specifically articulated in its brief on appeal. Third, even if the State bears the ultimate burden of persuasion with regard to the justification of this law, we are persuaded, given the very slight burden involved, that it survives constitutional scrutiny.
. Indeed, just during the pendency of this appeal, the State would have had to alter and replace such a Registration Form when the Green Party lost its continuing ballot access, and change it again when the Green Party regained access.
. The State also argues that § 16 — 152(A)(5) serves its interest of "maintaining the stability of Arizona’s political system through a healthy two-party system.” In light of our conclusion that § 16 — 152(A)(5) is rationally related to the State's legitimate interest in efficiently and accurately determining most voters’ registration preference, we do not address this assertion.