is illegal to circumvent that measure. However, Section 1201 creates several exceptions to this rule, and the Library of Congress is empowered to create additional exceptions. Distribution of Circumvention Tools The Act also prohibits the distribution of tools that enable a user to circumvent access controls or controls that protect a right of the copyright holder. Access Controls 17 U.S.C. Sec. 1201 (a)(2) provides: (2) No person shall manufacture, import, offer to the public, provide, or otherwise traffic in any technology, product, service, device, component, or part thereof, that— (A) is primarily designed or produced for the purpose of circumventing a technological measure that effectively controls access to a work protected under this title; (B) has only limited commercially significant purpose or use other than to circumvent a technological measure that effectively controls access to a work protected under this title; or (C) is marketed by that person or another acting in concert with that person with that person's knowledge for use in circumventing a technological measure that effectively controls access to a work protected under this title. Rights Controls Distribution of tools intended to circumvent controls that protect a right of the copyright holder is also prohibited. 17 U.S.C. Sec. 1201 (b) states: (1) No person shall manufacture, import, offer to the public, provide, or otherwise traffic in any technology, product, service, device, component, or part thereof, that— (A) is primarily designed or produced for the purpose of circumventing protection afforded by a technological measure that effectively protects a right of a copyright owner under this title in a work or a portion thereof; (B) has only limited commercially significant purpose or use other than to circumvent protection afforded by a technological measure that effectively protects a right of a copyright owner under this title in a work or a portion thereof; or (C) is marketed by that person or another acting in concert with that person with that person's knowledge for use in circumventing protection afforded by a technological measure that effectively protects a right of a copyright owner under this title in a work or a portion thereof. A rights control is defined in 17 U.S.C. Sec. 1201 (b)(2) (B): a technological measure "effectively protects a right of a copyright owner under this title" if the measure, in the ordinary course of its operation, prevents, restricts, or otherwise limits the exercise of a right of a copyright