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Justice Powell delivered the opinion of the Court.
This case presents the question whether a regulation of the Public Service Commission of the State of New York violates the First and Fourteenth Amendments because it completely bans promotional advertising by an electrical utility.
I
In December 1973, the Commission, appellee here, ordered electric utilities in New York State to cease all advertising that "[promotes] the use of electricity." The order was based on the Commission's finding that "the interconnected utility system in New York State does not have sufficient fuel stocks or sources of supply to continue furnishing all customer demands for the 1973-1974 winter."
Three years later, when the fuel shortage had eased, the Commission requested comments from the public on its proposal to continue the ban on promotional advertising. Central Hudson Gas & Electric Corp., the appellant in this case, opposed the ban on First Amendment grounds. After reviewing the public comments, the Commission extended the prohibition in a Policy Statement issued on February 25, 1977. . . .
II
The Commission's order restricts only commercial speech, that is, expression related solely to the economic interests of the speaker and its audience. The First Amendment, as applied to the States through the Fourteenth Amendment, protects commercial speech from unwarranted governmental regulation. Virginia Pharmacy Board. Commercial expression not only serves the economic interest of the speaker, but also assists consumers and furthers the societal interest in the fullest possible dissemination of information. In applying the First Amendment to this area, we have rejected the "highly paternalistic" view that government has complete power to suppress or regulate commercial speech. "[People] will perceive their own best interests if only they are well enough informed, and . . . the best means to that end is to open the channels of communication, rather than to close them. . . ." Even when advertising communicates only an incomplete version of the relevant facts, the First Amendment presumes that some accurate information is better than no information at all.
Nevertheless, our decisions have recognized "the 'commonsense' distinction between speech proposing a commercial transaction, which occurs in an area traditionally subject to government regulation, and other varieties of speech. " The Constitution therefore accords a lesser protection to commercial speech than to other constitutionally guaranteed expression. The protection available for particular commercial expression turns on the nature both of the expression and of the governmental interests served by its regulation.
Although this approach responds to the serious issues surrounding our national energy policy as raised in this case, we think it would blur further the line the Court has sought to draw in commercial speech cases. It would grant broad constitutional protection to any advertising that links a product to a current public debate. But many, if not most, products may be tied to public concerns with the environment, energy, economic policy, or individual health and safety. . . . [T]he failure to distinguish between commercial and noncommercial speech "could invite dilution, simply by a leveling process, of the force of the [First] Amendment's guarantee with respect to the latter kind of speech."
The First Amendment's concern for commercial speech is based on the informational function of advertising. Consequently, there can be no constitutional objection to the suppression of commercial messages that do not accurately inform the public about lawful activity. The government may ban forms of communication more likely to deceive the public than to inform it.
If the communication is neither misleading nor related to unlawful activity, the government's power is more circumscribed. The State must assert a substantial interest to be achieved by restrictions on commercial speech. Moreover, the regulatory technique must be in proportion to that interest. The limitation on expression must be designed carefully to achieve the State's goal. Compliance with this requirement may be measured by two criteria. First, the restriction must directly advance the state interest involved; the regulation may not be sustained if it provides only ineffective or remote support for the government's purpose. Second, if the governmental interest could be served as well by a more limited restriction on commercial speech, the excessive restrictions cannot survive.
Under the first criterion, the Court has declined to uphold regulations that only indirectly advance the state interest involved. In both Bates and Virginia Pharmacy Board, the Court concluded that an advertising ban could not be imposed to protect the ethical or performance standards of a profession. . . .
The second criterion recognizes that the First Amendment mandates that speech restrictions be "narrowly drawn." The regulatory technique may extend only as far as the interest it serves. The State cannot regulate speech that poses no danger to the asserted state interest, nor can it completely suppress information when narrower restrictions on expression would serve its interest as well. . . .
In commercial speech cases, then, a four-part analysis has developed. At the outset, we must determine whether the expression is protected by the First Amendment. For commercial speech to come within that provision, it at least must concern lawful activity and not be misleading. Next, we ask whether the asserted governmental interest is substantial. If both inquiries yield positive answers, we must determine whether the regulation directly advances the governmental interest asserted, and whether it is not more extensive than is necessary to serve that interest.
III
We now apply this four-step analysis for commercial speech to the Commission's arguments in support of its ban on promotional advertising.
The Commission does not claim that the expression at issue either is inaccurate or relates to unlawful activity. Yet the New York Court of Appeals questioned whether Central Hudson's advertising is protected commercial speech. Because appellant holds a monopoly over the sale of electricity in its service area, the state court suggested that the Commission's order restricts no commercial speech of any worth. . . . The court saw no constitutional problem with barring commercial speech that it viewed as conveying little useful information.
This reasoning falls short of establishing that appellant's advertising is not commercial speech protected by the First Amendment. Monopoly over the supply of a product provides no protection from competition with substitutes for that product. Electric utilities compete with suppliers of fuel oil and natural gas in several markets, such as those for home heating and industrial power. . . .
Even in monopoly markets, the suppression of advertising reduces the information available for consumer decisions and thereby defeats the purpose of the First Amendment. The New York court's argument appears to assume that the providers of a monopoly service or product are willing to pay for wholly ineffective advertising. Most businesses -- even regulated monopolies -- are unlikely to underwrite promotional advertising that is of no interest or use to consumers. Indeed, a monopoly enterprise legitimately may wish to inform the public that it has developed new services or terms of doing business. A consumer may need information to aid his decision whether or not to use the monopoly service at all, or how much of the service he should purchase. In the absence of factors that would distort the decision to advertise, we may assume that the willingness of a business to promote its products reflects a belief that consumers are interested in the advertising. Since no such extraordinary conditions have been identified in this case, appellant's monopoly position does not alter the First Amendment's protection for its commercial speech.
The Commission offers two state interests as justifications for the ban on promotional advertising. The first concerns energy conservation. Any increase in demand for electricity -- during peak or off-peak periods -- means greater consumption of energy. The Commission argues, and the New York court agreed, that the State's interest in conserving energy is sufficient to support suppression of advertising designed to increase consumption of electricity. In view of our country's dependence on energy resources beyond our control, no one can doubt the importance of energy conservation. Plainly, therefore, the state interest asserted is substantial.
The Commission also argues that promotional advertising will aggravate inequities caused by the failure to base the utilities' rates on marginal cost. . . . The State's concern that rates be fair and efficient represents a clear and substantial governmental interest. . . .
[T]he State's interest in energy conservation is directly advanced by the Commission order at issue here. There is an immediate connection between advertising and demand for electricity. . . .
We come finally to the critical inquiry in this case: whether the Commission's complete suppression of speech ordinarily protected by the First Amendment is no more extensive than necessary to further the State's interest in energy conservation. The Commission's order reaches all promotional advertising, regardless of the impact of the touted service on overall energy use. But the energy conservation rationale, as important as it is, cannot justify suppressing information about electric devices or services that would cause no net increase in total energy use. In addition, no showing has been made that a more limited restriction on the content of promotional advertising would not serve adequately the State's interests. . . .
IV
Our decision today in no way disparages the national interest in energy conservation. We accept without reservation the argument that conservation, as well as the development of alternative energy sources, is an imperative national goal. . . . When, however, such action involves the suppression of speech, the First and Fourteenth Amendments require that the restriction be no more extensive than is necessary to serve the state interest. In this case, the record before us fails to show that the total ban on promotional advertising meets this requirement.
Accordingly, the judgment of the New York Court of Appeals is reversed.