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ยง 201.40 Exemption to prohibition against circumvention. (a) General. This section prescribes the classes of copyrighted works for which the Librarian of Congress has determined, pursuant to 17 U.S.C. 1201(a)(1)(C) and (D), that noninfringing uses by persons who are users of such works are, or are likely to be, adversely affected. The prohibition against circumvention of technological measures that control access to copyrighted works set forth in 17 U.S.C. 1201(a)(1)(A) shall not apply to such users of the prescribed classes of copyrighted works. (b) Classes of copyrighted works. Pursuant to the authority set forth in 17 U.S.C. 1201(a)(1)(C) and (D), and upon the recommendation of the Register of Copyrights, the Librarian has determined that during the period from October 28, 2003, through October 27, 2006, the prohibition against circumvention of technological measures that effectively control access to copyrighted works set forth in 17 U.S.C. 1201(a)(1)(A) shall not apply to persons who engage in noninfringing uses of the following four classes of copyrighted works: (1) Compilations consisting of lists of Internet locations blocked by commercially marketed filtering software applications that are intended to prevent access to domains, websites or portions of websites, but not including lists of Internet locations blocked by software applications that operate exclusively to protect against damage to a computer or computer network or lists of Internet locations blocked by software applications that operate exclusively to prevent receipt of e-mail. (2) Computer programs protected by dongles that prevent access due to malfunction or damage and which are obsolete. (3) Computer programs and video games distributed in formats that have become obsolete and which require the original media or hardware as a condition of access. A format shall be considered obsolete if the machine or system necessary to render perceptible a work stored in that format is no longer manufactured or is no longer reasonably available in the commercial marketplace. (4) Literary works distributed in ebook format when all existing ebook editions of the work (including digital text editions made available by authorized entities) contain access controls that prevent the enabling of the ebook's read-aloud function and that prevent the enabling of screen readers to render the text into a specialized format. (c) Definitions. (1) "Internet locations" are defined to include domains, uniform resource locators (URLs), numeric IP addresses or any combination thereof. (2) "Obsolete" shall mean "no longer manufactured or reasonably available in the commercial marketplace." (3) "Specialized format," "digital text" and "authorized entities" shall have the same meaning as in 17 U.S.C. 121. [65 FR 64574, Oct. 27, 2000, as amended at 68 FR 62018, Oct. 31, 2003]