47 U.S. Code § 230 - Protection for private blocking and screening of offensive material
The Congress finds the following:
(1) The rapidly developing array of Internet and other interactive computer services available to individual Americans represent an extraordinary advance in the availability of educational and informational resources to our citizens.
(2) These services offer users a great degree of control over the information that they receive, as well as the potential for even greater control in the future as technology develops.
(3) The Internet and other interactive computer services offer a forum for a true diversity of political discourse, unique opportunities for cultural development, and myriad avenues for intellectual activity.
(4) The Internet and other interactive computer services have flourished, to the benefit of all Americans, with a minimum of government regulation.
It is the policy of the United States—
(1) to promote the continued development of the Internet and other interactive computer services and other interactive media;
(2) to preserve the vibrant and competitive free market that presently exists for the Internet and other interactive computer services, unfettered by Federal or State regulation;
(3) to encourage the development of technologies which maximize user control over what information is received by individuals, families, and schools who use the Internet and other interactive computer services;
(4) to remove disincentives for the development and utilization of blocking and filtering technologies that empower parents to restrict their children’s access to objectionable or inappropriate online material; and
(c) Protection for “Good Samaritan” blocking and screening of offensive material
(1) Treatment of publisher or speaker
No provider or user of an interactive computer service shall be treated as the publisher or speaker of any information provided by another information content provider.
(2) Civil liability
No provider or user of an interactive computer service shall be held liable on account of—
(A) any action voluntarily taken in good faith to restrict access to or availability of material that the provider or user considers to be obscene, lewd, lascivious, filthy, excessively violent, harassing, or otherwise objectionable, whether or not such material is constitutionally protected; or
(B) any action taken to enable or make available to information content providers or others the technical means to restrict access to material described in paragraph (1). 
(d) Obligations of interactive computer service
A provider of interactive computer service shall, at the time of entering an agreement with a customer for the provision of interactive computer service and in a manner deemed appropriate by the provider, notify such customer that parental control protections (such as computer hardware, software, or filtering services) are commercially available that may assist the customer in limiting access to material that is harmful to minors. Such notice shall identify, or provide the customer with access to information identifying, current providers of such protections.
(e) Effect on other laws
(1) No effect on criminal law
(2) No effect on intellectual property law
Nothing in this section shall be construed to limit or expand any law pertaining to intellectual property.
(3) State law
Nothing in this section shall be construed to prevent any State from enforcing any State law that is consistent with this section. No cause of action may be brought and no liability may be imposed under any State or local law that is inconsistent with this section.
As used in this section:
The term “Internet” means the international computer network of both Federal and non-Federal interoperable packet switched data networks.
(2) Interactive computer service
The term “interactive computer service” means any information service, system, or access software provider that provides or enables computer access by multiple users to a computer server, including specifically a service or system that provides access to the Internet and such systems operated or services offered by libraries or educational institutions.
(3) Information content provider
The term “information content provider” means any person or entity that is responsible, in whole or in part, for the creation or development of information provided through the Internet or any other interactive computer service.
(4) Access software provider
The term “access software provider” means a provider of software (including client or server software), or enabling tools that do any one or more of the following:
 So in original. Probably should be “subparagraph (A).”
Source(June 19, 1934, ch. 652, title II, § 230, as added Pub. L. 104–104, title V, § 509,Feb. 8, 1996, 110 Stat. 137; amended Pub. L. 105–277, div. C, title XIV, § 1404(a),Oct. 21, 1998, 112 Stat. 2681–739.)
References in Text
The Electronic Communications Privacy Act of 1986, referred to in subsec. (e)(4), is Pub. L. 99–508, Oct. 21, 1986, 100 Stat. 1848, as amended. For complete classification of this Act to the Code, see Short Title of 1986 Amendment note set out under section 2510 of Title 18, Crimes and Criminal Procedure, and Tables.
Section 509 ofPub. L. 104–104, which directed amendment of title II of the Communications Act of 1934 (47 U.S.C. 201 et seq.) by adding section 230 at end, was executed by adding the section at end of part I of title II of the Act to reflect the probable intent of Congress and amendments by sections 101(a), (b), and 151(a) ofPub. L. 104–104designating §§ 201 to 229 as part I and adding parts II (§ 251 et seq.) and III (§ 271 et seq.) to title II of the Act.
1998—Subsec. (d). Pub. L. 105–277, § 1404(a)(3), added subsec. (d). Former subsec. (d) redesignated (e).
Subsecs. (e), (f). Pub. L. 105–277, § 1404(a)(2), redesignatedsubsecs. (d) and (e) as (e) and (f), respectively.
Effective Date of 1998 Amendment