Mr. Justice WHITE delivered the opinion of the Court.
The Federal Communications Commission has for many years imposed on radio and television broadcasters the requirement that discussion of public issues be presented on broadcast stations, and that each side of those issues must be given fair coverage. This is known as the fairness doctrine, which originated very early in the history of broadcasting and has maintained its present outlines for some time. It is an obligation whose content has been defined in a long series of FCC rulings in particular cases, and which is distinct from the statutory requirement of s 315 of the Communications Act1 that equal time be allotted all qualified candidates for public office. Two aspects of the fairness doctrine, relating to personal attacks in the context of controversial public issues and to political editorializing, were codified more precisely in the form of FCC regulations in 1967. The two cases before us now, which were decided separately below, challenge the constitutional and statutory bases of the doctrine and component rules. Red Lion involves the application of the fairness doctrine to a particular broadcast, and RTNDA arises as an action to review the FCC’s 1967 promulgation of the personal attack and political editorializing regulations, which were laid down after the Red Lion litigation had begun.
I.
A.
The Red Lion Broadcasting Company is licensed to operate a Pennsylvania radio station, WGCB. On November 27, 1964, WGCB carried a 15-minute broadcast by the Reverend Billy James Hargis as part of a ‘Christian Crusade’ series. A book by Fred J. Cook entitled ‘Goldwater—Extremist on the Right’ was discussed by Hargis, who said that Cook had been fired by a newspaper for making false charges against city officials; that Cook had then worked for a Communist-affiliated publication; that he had defended Alger Hiss and attacked J. Edgar Hoover and the Central Intelligence Agency; and that he had now written a ‘book to smear and destroy Barry Goldwater.’ When Cook heard of the broadcast he concluded that he had been personally attacked and demanded free reply time, which the station refused. After an exchange of letters among Cook, Red Lion, and the FCC, the FCC declared that the Hargis broadcast constituted a personal attack on Cook; that Red Lion had failed to meet its obligation under the fairness doctrine, to send a tape, transcript, or summary of the broadcast to Cook and offer him reply time; and that the station must provide reply time whether or not Cook would pay for it. On review in the Court of Appeals for the District of Columbia Circuit, the FCC’s position was upheld as constitutional and otherwise proper.
B.
As they now stand amended, the regulations read as follows:
‘Personal attacks; political editorials.
‘(a) When, during the presentation of views on a controversial issue of public importance, an attack is made upon the honesty, character, integrity or like personal qualities of an identified person or group, the licensee shall, within a reasonable time and in no event later than 1 week after the attack, transmit to the person or group attacked (1) notification of the date, time and identification of the broadcast; (2) a script or tape (or an accurate summary if a script or tape is not available ) of the attack, and (3) an offer of a reasonable opportunity to respond over the licensee’s facilities.
‘(b) The provisions of paragraph (a) of this section shall not be applicable (1) to attacks on foreign groups or foreign public figures; (2) to personal attacks which are made by legally qualified candidates, their authorized spokesmen, or those associated with them in the campaign, on other such candidates, their authorized spokesmen, or persons associated with the candidates in the campaign; and (3) to bona fide newscasts, bona fide news interviews, and on-the-spot coverage of a bona fide news event (including commentary or analysis contained in the foregoing programs, but the provisions of paragraph (a) of this section shall be applicable to editorials of the licensee).
‘NOTE: The fairness doctrine is applicable to situations coming within ((3)), above, and, in a specific factual situation, may be applicable in the ((2)), above. See, section 315(a) of the Act, 47 U.S.C. s 315(a); Public Notice: Applicability of the Fairness Doctrine in the Handling of Controversial Issues of Public Importance. 29 F.R. 10415. The categories listed in ((3)) are the same as those specified in section 315(a) of the Act.
‘(c) Where a licensee, in an editorial, (i) endorses or (ii) opposes a legally qualified candidate or candidates, the licensee shall, within 24 hours after the editorial, transmit to respectively (i) the other qualified candidate or candidates for the same office or (ii) the candidate opposed in the editorial (1) notification of the date and the time of the editorial; (2) a script or tape of the editorial; and (3) an offer of a reasonable opportunity for a candidate or a spokesman of the candidate to respond over the licensee’s facilities: Provided, however, That where such editorials are broadcast within 72 hours prior to the day of the election, the licensee shall comply with the provisions of this paragraph sufficiently far in advance of the broadcast to enable the candidate or candidates to have a reasonable opportunity to prepare a response and to present it in a timely fashion.’ 47 CFR ss 73.123, 73.300, 73.598, 73.679 (all identical).
C.
Believing that the specific application of the fairness doctrine in Red Lion, and the promulgation of the regulations in RTNDA, are both authorized by Congress and enhance rather than abridge the freedoms of speech and press protected by the First Amendment, we hold them valid and constitutional, reversing the judgment below in RTNDA and affirming the judgment below in Red Lion.
III.
The broadcasters challenge the fairness doctrine and its specific manifestations in the personal attack and political editorial rules on conventional First Amendment grounds, alleging that the rules abridge their freedom of speech and press. Their contention is that the First Amendment protects their desire to use their allotted frequencies continuously to broadcast whatever they choose, and to exclude whomever they choose from ever using that frequency. No man may be prevented from saying or publishing what he thinks, or from refusing in his speech or other utterances to give equal weight to the views of his opponents. This right, they say, applies equally to broadcasters.
A.
Although broadcasting is clearly a medium affected by a First Amendment interest, differences in the characteristics of new media justify differences in the First Amendment standards applied to them.
When two people converse face to face, both should not speak at once if either is to be clearly understood. But the range of the human voice is so limited that there could be meaningful communications if half the people in the United States were talking and the other half listening. Just as clearly, half the people might publish and the other half read. But the reach of radio signals is incomparably greater than the range of the human voice and the problem of interference is a massive reality. The lack of know-how and equipment may keep many from the air, but only a tiny fraction of those with resources and intelligence can hope to communicate by radio at the same time if intelligible communication is to be had, even if the entire radio spectrum is utilized in the present state of commercially acceptable technology.
It was this fact, and the chaos which ensued from permitting anyone to use any frequency at whatever power level he wished, which made necessary the enactment of the Radio Act of 1927 and the Communications Act of 1934,16 as the Court has noted at length before. It was this reality which at the very least necessitated first the division of the radio spectrum into portions reserved respectively for public broadcasting and for other important radio uses such as amateur operation, aircraft, police, defense, and navigation; and then the subdivision of each portion, and assignment of specific frequencies to individual users or groups of users. Beyond this, however, because the frequencies reserved for public broadcasting were limited in number, it was essential for the Government to tell some applicants that they could not broadcast at all because there was room for only a few.
Where there are substantially more individuals who want to broadcast than there are frequencies to allocate, it is idle to posit an unabridgeable First Amendment right to broadcast comparable to the right of every individual to speak, write, or publish. If 100 persons want broadcast licenses but there are only 10 frequencies to allocate, all of them may have the same ‘right’ to a license; but if there is to be any effective communication by radio, only a few can be licensed and the rest must be barred from the airwaves. It would be strange if the First Amendment, aimed at protecting and furthering communications, prevented the Government from making radio communication possible by requiring licenses to broadcast and by limiting the number of licenses so as not to overcrowd the spectrum.
By the same token, as far as the First Amendment is concerned those who are licensed stand no better than those to whom licenses are refused. A license permits broadcasting, but the lisensee has no constitutional right to be the one who holds the license or to monopolize a radio frequency to the exclusion of his fellow citizens. There is nothing in the First Amendment which prevents the Government from requiring a licensee to share his frequency with others and to conduct himself as a proxy or fiduciary with obligations to present those views and voices which are representative of his community and which would otherwise, by necessity, be barred from the airwaves.
This is not to say that the First Amendment is irrelevant to public broadcasting. On the contrary, it has a major role to play as the Congress itself recognized in s 326, which forbids FCC interference with ‘the right of free speech by means of radio communication.’ Because of the scarcity of radio frequencies, the Government is permitted to put restraints on licensees in favor of others whose views should be expressed on this unique medium. But the people as a whole retain their interest in free speech by radio and their collective right to have the medium function consistently with the ends and purposes of the First Amendment. It is the right of the viewers and listeners, not the right of the broadcasters, which is paramount. It is the purpose of the First Amendment to preserve an uninhibited marketplace of ideas in which truth will ultimately prevail, rather than to countenance monopolization of that market, whether it be by the Government itself or a private licensee. It is the right of the public to receive suitable access to social, political, esthetic, moral, and other ideas and experiences which is crucial here. That right may not constitutionally be abridged either by Congress or by the FCC.
B.
Rather than confer frequency monopolies on a relatively small number of licensees, in a Nation of 200,000,000, the Government could surely have decreed that each frequency should be shared among all or some of those who wish to use it, each being assigned a portion of the broadcast day or the broadcast week. The ruling and regulations at issue here do not go quite so far. They assert that under specified circumstances, a licensee must offer to make available a reasonable amount of broadcast time to those who have a view different from that which has already been expressed on his station. The expression of a political endorsement, or of a personal attack while dealing with a controversial public issue, simply triggers this time sharing. As we have said, the First Amendment confers no right on licensees to prevent others from broadcasting on ‘their’ frequencies and no right to an unconditional monopoly of a scarce resource which the Government has denied others the right to use. In terms of constitutional principle, and as enforced sharing of a scarce resource, the personal attack and political editorial rules are indistinguishable from the equal-time provision of s 315, a specific enactment of Congress requiring stations to set aside reply time under specified circumstances and to which the fairness doctrine and these constituent regulations are important complements. That provision, which has been part of the law since 1927, Radio Act of 1927, s 18, 44 Stat. 1170, has been held valid by this Court as an obligation of the licensee relieving him of any power in any way to prevent or censor the broadcast, and thus insulating him from liability for defamation.
Nor can we say that it is inconsistent with the First Amendment goal of producing an informed public capable of conducting its own affairs to require a broadcaster to permit answers to personal attacks occurring in the course of discussing controversial issues, or to require that the political opponents of those endorsed by the station be given a chance to communicate with the public. Otherwise, station owners and a few networks would have unfettered power to make time available only to the highest bidders, to communicate only their own views on public issues, people and candidates, and to permit on the air only those with whom they agreed. There is no sanctuary in the First Amendment for unlimited private censorship operating in a medium not open to all. ‘Freedom of the press from governmental interference under the First Amendment does not sanction repression of that freedom by private interests.’
C.
It is strenuously argued, however, that if political editorials or personal attacks will trigger an obligation in broadcasters to afford the opportunity for expression to speakers who need not pay for time and whose views are unpalatable to the licensees, then broadcasters will be irresistibly forced to self-censorship and their coverage of controversial public issues will be eliminated or at least rendered wholly ineffective. Such a result would indeed be a serious matter, for should licensees actually eliminate their coverage of controversial issues, the purposes of the doctrine would be stifled.
At this point, however, as the Federal Communications Commission has indicated, that possibility is at best speculative. If experience with the administration of those doctrines indicates that they have the net effect of reducing rather than enhancing the volume and quality of coverage, there will be time enough to reconsider the constitutional implications. The fairness doctrine in the past has had no such overall effect.
That this will occur now seems unlikely, however, since if present licensees should suddenly prove timorous, the Commission is not powerless to insist that they give adequate and fair attention to public issues. It does not violate the First Amendment to treat licensees given the privilege of using scarce radio frequencies as proxies for the entire community, obligated to give suitable time and attention to matters of great public concern. To condition the granting or renewal of licenses on a willingness to present representative community views on controversial issues is consistent with the ends and purposes of those constitutional provisions forbidding the abridgment of freedom of speech and freedom of the press.
E.
It is argued that even if at one time the lack of available frequencies for all who wished to use them justified the Government’s choice of those who would best serve the public interest by acting as proxy for those who would present differing views, or by giving the latter access directly to broadcast facilities, this condition no longer prevails so that continuing control is not justified. To this there are several answers.
Scarcity is not entirely a thing of the past. Advances in technology, such as microwave transmission, have led to more efficient utilization of the frequency spectrum, but uses for that spectrum have also grown apace. Portions of the spectrum must be reserved for vital uses unconnected with human communication, such as radio-navigational aids used by aircraft and vessels. Conflicts have even emerged between such vital functions as defense preparedness and experimentation in methods of averting midair collisions through radio warning devices. Nothing in this record, or in our own researches, convinces us that the resource is no longer one for which there are more immediate and potential uses than can be accommodated, and for which wise planning is essential.
Even where there are gaps in spectrum utilization, the fact remains that existing broadcasters have often attained their present position because of their initial government selection in competition with others before new technological advances opened new opportunities for further uses. Long experience in broadcasting, confirmed habits of listeners and viewers, network affiliation, and other advantages in program procurement give existing broadcasters a substantial advantage over new entrants, even where new entry is technologically possible. These advantages are the fruit of a preferred position conferred by the Government. Some present possibility for new entry by competing stations is not enough, in itself, to render unconstitutional the Government’s effort to assure that a broadcaster’s programming ranges widely enough to serve the public interest.
In view of the scarcity of broadcast frequencies, the Government’s role in allocating those frequencies, and the legitimate claims of those unable without governmental assistance to gain access to those frequencies for expression of their views, we hold the regulations and ruling at issue here are both authorized by statute and constitutional. The judgment of the Court of Appeals in Red Lion is affirmed and that in RTNDA reversed and the causes remanded for proceedings consistent with this opinion.
It is so ordered.