Mr. Justice White
delivered the opinion of the Court.
In Kramer v. Union Free School District, 395 U. S. 621 (1969), this Court held that a State could not restrict the vote in school district elections to owners and lessees of real property and parents of school children because the exclusion of otherwise qualified voters was not shown to be necessary to promote a compelling state interest. This ruling, by its terms applicable to elections of public officials, was extended to elections for the approval of revenue bonds to finance local improvements in Cipriano v. City of Houma, 395 U. S. 701 (1969). Our decision in Cipriano did not, however, reach the question now presented for decision: Does the Federal Constitution permit a State to restrict to real property taxpayers the vote in elections to approve the issuance of general obligation bonds?
This question arises in the following factual setting: On June 10, 1969, the City of Phoenix, Arizona, held an election to authorize the issuance of $60,450,000 in general obligation bonds as well as certain revenue bonds. Under Arizona law, property taxes were to be levied to service this indebtedness, although the city was legally privileged to use other revenues for this purpose.1 The [206]*206general obligation bonds were to be issued to finance various municipal improvements, with the largest amounts to go for the city sewer system, parks and playgrounds, police and public safety buildings, and libraries. Pursuant to Arizona constitutional and statutory provisions,2 only otherwise qualified voters who were also real property taxpayers were permitted to vote on these bond issues. All of the bond issues submitted to the voters were approved by a majority of those voting.
On June 16, 1969, six days after the election in Phoenix, this Court held in Cipriano v. City of Houma, supra, that restricting the franchise to property taxpayers in elections on revenue bonds violated the Equal Protection Clause of the Fourteenth Amendment. That ruling was applied to the case before the Court in which under local law the authorization of the revenue bonds was not yet final when the challenge to the election was raised in the District Court. On August 1, 1969, ap-pellee Kolodziejski, a Phoenix resident who was otherwise qualified to vote but who owned no real property, filed [207]*207her complaint in the United States District Court for the District of Arizona challenging the constitutionality of the restriction on the franchise in Arizona bond elections and attacking the validity of the June 1969 election approving the Phoenix bond issues. A District Court of three judges was convened. In the District Court, appellants conceded that, under this Court’s decisions in Cipriano and Kramer, supra, the bond election was invalid with regard to the revenue bonds that had been approved. The District Court perceived no significant difference between revenue bonds and general obligation bonds and therefore held that the exclusion of nonproperty-owning voters from the election on the general obligation bonds was unconstitutional under Cipriano and Kramer. Because the authorization of the Phoenix general obligation bonds was not final on the date of the Cipriano decision, the court held the Cipriano rule applicable and declared the June 10, 1969, bond election invalid. The appellants were enjoined from taking further action to issue the bonds approved in that election. The City of Phoenix and the members of the City Council appealed from the judgment of the District Court with respect to the general obligation bonds. We noted probable jurisdiction, 397 U. S. 903 (1970). We affirm the judgment of the District Court but do not agree that the ruling in this case should be retroactive to the date of the Cipriano decision.
I
In Cipriano v. City of Houma, supra, the denial of the franchise to nonproperty owners in elections on revenue bonds was held to be a denial of the Fourteenth Amendment rights of the nonproperty owners since they, as well as property owners, are substantially affected by the issuance of revenue bonds to finance municipal utilities. It is now argued that the rationale of Cipriano does not render unconstitutional the exclusion of non-[208]*208property owners from voting in elections on general obligation bonds.
The argument proceeds on two related fronts. First, it is said that the Arizona statutes require that property taxes be levied in an amount sufficient to service the general obligation bonds,3 the law thus expressly placing a special burden on property owners for the benefit of the entire community. Second, and more generally, whereas revenue bonds are secured by the revenues from the operation of particular facilities and these revenues may be earned from both property owners and non-property owners, general obligation bonds are secured by the general taxing power of the issuing municipality. Since most municipalities rely to a substantial extent on property tax revenues which will be used to make debt service payments if other revenue sources prove insufficient,4 general obligation bonds are in effect a lien on the real property subject to taxation by the issuing municipality. Whatever revenues are actually used to service the bonds, an unavoidable potential tax burden is imposed only on those who own realty since that property cannot be moved beyond the reach of the municipality's taxing power. Hence, according to appellants, the State is justified in recognizing the unique interests of real property owners by allowing only property taxpayers to participate in elections to approve the issuance of general obligation bonds.
Concededly, the case of elections to approve general obligation bonds was not decided in Cipriano v. City of Houma, supra. But we have concluded that the prin[209]*209ciples of that case, and of Kramer v. Union Free School District, supra, dictate a like result where a State excludes nonproperty taxpayers from voting in elections for the approval of general obligation bonds. The differences between the interests of property owners and the interests of nonproperty owners are not sufficiently substantial to justify excluding the latter from the franchise. This is so for several reasons.
First, it is unquestioned that all residents of Phoenix, property owners and nonproperty owners alike, have a substantial interest in the public facilities and the services available in the city and will be substantially affected by the ultimate outcome of the bond election at issue in this case. Presumptively, when all citizens are affected in important ways by a governmental decision subject to a referendum, the Constitution does not permit weighted voting or the exclusion of otherwise qualified citizens from the franchise.
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Mr. Justice White
delivered the opinion of the Court.
In Kramer v. Union Free School District, 395 U. S. 621 (1969), this Court held that a State could not restrict the vote in school district elections to owners and lessees of real property and parents of school children because the exclusion of otherwise qualified voters was not shown to be necessary to promote a compelling state interest. This ruling, by its terms applicable to elections of public officials, was extended to elections for the approval of revenue bonds to finance local improvements in Cipriano v. City of Houma, 395 U. S. 701 (1969). Our decision in Cipriano did not, however, reach the question now presented for decision: Does the Federal Constitution permit a State to restrict to real property taxpayers the vote in elections to approve the issuance of general obligation bonds?
This question arises in the following factual setting: On June 10, 1969, the City of Phoenix, Arizona, held an election to authorize the issuance of $60,450,000 in general obligation bonds as well as certain revenue bonds. Under Arizona law, property taxes were to be levied to service this indebtedness, although the city was legally privileged to use other revenues for this purpose.1 The [206]*206general obligation bonds were to be issued to finance various municipal improvements, with the largest amounts to go for the city sewer system, parks and playgrounds, police and public safety buildings, and libraries. Pursuant to Arizona constitutional and statutory provisions,2 only otherwise qualified voters who were also real property taxpayers were permitted to vote on these bond issues. All of the bond issues submitted to the voters were approved by a majority of those voting.
On June 16, 1969, six days after the election in Phoenix, this Court held in Cipriano v. City of Houma, supra, that restricting the franchise to property taxpayers in elections on revenue bonds violated the Equal Protection Clause of the Fourteenth Amendment. That ruling was applied to the case before the Court in which under local law the authorization of the revenue bonds was not yet final when the challenge to the election was raised in the District Court. On August 1, 1969, ap-pellee Kolodziejski, a Phoenix resident who was otherwise qualified to vote but who owned no real property, filed [207]*207her complaint in the United States District Court for the District of Arizona challenging the constitutionality of the restriction on the franchise in Arizona bond elections and attacking the validity of the June 1969 election approving the Phoenix bond issues. A District Court of three judges was convened. In the District Court, appellants conceded that, under this Court’s decisions in Cipriano and Kramer, supra, the bond election was invalid with regard to the revenue bonds that had been approved. The District Court perceived no significant difference between revenue bonds and general obligation bonds and therefore held that the exclusion of nonproperty-owning voters from the election on the general obligation bonds was unconstitutional under Cipriano and Kramer. Because the authorization of the Phoenix general obligation bonds was not final on the date of the Cipriano decision, the court held the Cipriano rule applicable and declared the June 10, 1969, bond election invalid. The appellants were enjoined from taking further action to issue the bonds approved in that election. The City of Phoenix and the members of the City Council appealed from the judgment of the District Court with respect to the general obligation bonds. We noted probable jurisdiction, 397 U. S. 903 (1970). We affirm the judgment of the District Court but do not agree that the ruling in this case should be retroactive to the date of the Cipriano decision.
I
In Cipriano v. City of Houma, supra, the denial of the franchise to nonproperty owners in elections on revenue bonds was held to be a denial of the Fourteenth Amendment rights of the nonproperty owners since they, as well as property owners, are substantially affected by the issuance of revenue bonds to finance municipal utilities. It is now argued that the rationale of Cipriano does not render unconstitutional the exclusion of non-[208]*208property owners from voting in elections on general obligation bonds.
The argument proceeds on two related fronts. First, it is said that the Arizona statutes require that property taxes be levied in an amount sufficient to service the general obligation bonds,3 the law thus expressly placing a special burden on property owners for the benefit of the entire community. Second, and more generally, whereas revenue bonds are secured by the revenues from the operation of particular facilities and these revenues may be earned from both property owners and non-property owners, general obligation bonds are secured by the general taxing power of the issuing municipality. Since most municipalities rely to a substantial extent on property tax revenues which will be used to make debt service payments if other revenue sources prove insufficient,4 general obligation bonds are in effect a lien on the real property subject to taxation by the issuing municipality. Whatever revenues are actually used to service the bonds, an unavoidable potential tax burden is imposed only on those who own realty since that property cannot be moved beyond the reach of the municipality's taxing power. Hence, according to appellants, the State is justified in recognizing the unique interests of real property owners by allowing only property taxpayers to participate in elections to approve the issuance of general obligation bonds.
Concededly, the case of elections to approve general obligation bonds was not decided in Cipriano v. City of Houma, supra. But we have concluded that the prin[209]*209ciples of that case, and of Kramer v. Union Free School District, supra, dictate a like result where a State excludes nonproperty taxpayers from voting in elections for the approval of general obligation bonds. The differences between the interests of property owners and the interests of nonproperty owners are not sufficiently substantial to justify excluding the latter from the franchise. This is so for several reasons.
First, it is unquestioned that all residents of Phoenix, property owners and nonproperty owners alike, have a substantial interest in the public facilities and the services available in the city and will be substantially affected by the ultimate outcome of the bond election at issue in this case. Presumptively, when all citizens are affected in important ways by a governmental decision subject to a referendum, the Constitution does not permit weighted voting or the exclusion of otherwise qualified citizens from the franchise. Arizona nevertheless excludes nonproperty owners from participating in bond elections and vests in the majority of individual property owners voting in the election the power to approve or disapprove facilities that the municipal government has determined should be financed by issuing general obligation bonds. Placing such power in property owners alone can be justified only by some overriding interest of those owners that the State is entitled to recognize.
Second, although Arizona law ostensibly calls for the levy of real property taxes to service general obligation bonds, other revenues are legally available for this purpose. According to the parties’ stipulation in this case, it is anticipated with respect to the instant bonds, as has been true in the past, that more than half of the debt service requirements will be satisfied not from real property taxes but from revenues from other local taxes paid by nonproperty owners as ■well as those who own real [210]*210property.5 Not only do those persons excluded from the franchise have a great interest in approving or disapproving municipal improvements, but they will also contribute, as directly as property owners, to the servicing of the bonds by the payment of taxes to be used for this purpose.
Third, the justification for restricting the franchise to the property owners would seem to be strongest in the case of a municipality which, unlike Phoenix, looks only to property tax revenues for servicing general obligation bonds. But even in such a case the justification would be insufficient. Property taxes may be paid initially by property owners, but a significant part of the ultimate burden of each year’s tax on rental property will very likely be borne by the tenant rather than the landlord since, as the parties also stipulated in this case, the landlord will treat the property tax as a business expense and normally will be able to pass all or a large part of this cost on to the tenants in the form of higher rent.6 Since most city residents not owning their [211]*211own homes are lessees of dwelling units, virtually all residents share the burden of property taxes imposed and used to service general obligation bonds. Moreover, property taxes on commercial property,7 much of which is owned by corporations having no vote, will be treated as a cost of doing business and will normally be reflected in the prices of goods and services purchased by nonproperty owners and property owners alike.
While in theory the expected future income from real property, and hence property values in a municipality, may depend in part on the predicted future levels of property taxes,8 the actual impact of an increase in property taxes is problematical.9 Moreover, to the extent that property values are directly affected by the additional potential tax burden entailed in the bond issue, any adverse effect would normally be offset at least in substantial part by the favorable effects on property values of the improvements to be financed by the bond issue.10
[212]*212It is true that a general obligation bond may be loosely described as a “lien” on the property within the jurisdiction of the municipality in the sense that the issuer undertakes to levy sufficient taxes to service the bond. In theory, if the economy of the issuing city were to collapse, the levy of sufficiently high property taxes on property producing little or no income might result in some cases in defaults, foreclosures, and tax sales. Nothing before us, however, indicates that the possibility of future foreclosures to meet bond obligations significantly affects current real estate values or the ability of the concerned property owner to liquidate his holdings to avoid the risk of those future difficulties; the price of real estate appears to be more a function of the health of the local economy than a reflection of the level of property taxes imposed to finance municipal improvements. In any event, we are not convinced that the risk of future economic collapse that might result in bond obligations becoming an unshiftable, unsharable burden on property owners is sufficiently real or substantial to justify denying the vote in a current bond election to all those nonproperty owners who have a significant interest in the facilities to be financed, who are now indirectly sharing the property tax burden, and who will be paying other taxes used by the municipality to service its general obligation bonds.
We thus conclude that, although owners of real property have interests somewhat different from the interests of nonproperty owners in the issuance of general obligation bonds, there is no basis for concluding that non-property owners are substantially less interested in the issuance of these securities than are property owners. That there is no adequate reason to restrict the franchise on the issuance of general obligation bonds to property owners is further evidenced by the fact that only 14 [213]*213States now restrict the franchise in this way;11 most States find it possible to protect property owners from excessive property tax burdens by means other than restricting the franchise to property owners. The States now allowing all qualified voters to vote in general obligation bond elections do not appear to have been significantly less successful in protecting property values and in soundly financing their municipal improvements. Nor have we been shown that the 14 States now restricting the franchise have unique problems that make it necessary to limit the vote to property owners. We must therefore affirm the District Court’s declaratory judgment that the challenged provisions of the Arizona Constitution and statutes, as applied to exclude nonproperty owners from elections for the approval of the issuance of general obligation bonds, violate the Equal Protection Clause of the United States Constitution.
II
In view of the fact that over the years many general obligation bonds have been issued on the good-faith assumption that restriction of the franchise in bond elections was not prohibited by the Federal Constitution, [214]*214it would be unjustifiably disruptive to give our decision in this case full retroactive effect. We therefore adopt a rule similar to that employed with respect to the applicability of the Cipriano decision: our decision in this case will apply only to authorizations for general obligation bonds that are not final as of June 23, 1970, the date of this decision. In the case of States authorizing challenges to bond elections within a definite period, all elections held prior to the date of this decision will not be affected by this decision unless a challenge on the grounds sustained by this decision has been or is brought within the period specified by state law. In the case of States, including apparently Arizona,12 that do not have a well-defined period for bringing challenges to bond elections, all elections held prior to the date of this decision that have not yet been challenged on the grounds sustained in this decision prior to the date of this decision will not be open to challenge on the basis of our ruling in this case. In addition, in States with no definite challenge period, the validity of general obligation bonds that have been issued before this decision and prior to the commencement of an action challenging the issuance on the grounds sustained by this decision will not be affected by the decision in this case. Since ap-pellee in this case brought her constitutional challenge to the Phoenix election prior to the date of our decision in this case and no bonds have been issued pursuant to [215]*215that election, our decision applies to the election involved in this case. The District Court was therefore correct in holding that the June 10, 1969, bond election in Phoenix was constitutionally invalid and in enjoining the issuance of bonds pursuant to the approval obtained in that election.
Affirmed.
Mr. Justice Black concurs in the judgment and in Part I of the opinion of the Court.
Mr. Justice Blackmun took no part in the consideration or decision of this case.