Sharon Wang, Reference Librarian at Osgoode Hall Law School, points us to this from Mondaq:
Effective November 27, 2006, the Librarian of Congress announced the adoption of six exemptions to the Digital Millennium Copyright Act’s (“DMCA”) anti-circumvention provision, the exemptions to apply for the next three years. The announcement renewed three exemptions granted in prior rulemakings: computer programs protected by obsolete dongles; computer programs and video games distributed in obsolete formats; and eBooks with disabled read-aloud functions. In addition, three new classes of works received exemptions: audiovisual works in a university film archive; firmware on mobile telephone handsets; and sound recordings on CDs protected by access controls that create security vulnerabilities.
These exemptions will have significant impact primarily in the particular industries to which they pertain….
The official ruling can be found at http://www.copyright.gov/fedreg/2006/71fr68472.html