TLDR: This changes nothing.
Today the Librarian of Congress announced new rules promulgated pursuant to the Librarian's rulemaking authority under the Digital Millennium Copyright Act to exempt certain actions from the prohibition against circumvention of copyright protection systems found in 17 U.S.C. §1201. The "anti-circumvention provision" states:
No person shall circumvent a technological measure that effectively controls access to a work protected under this title.The Librarian is required by §1201 to make read more