This looks like a minor housekeeping change to the agreement that the (U.S.) National Archives and Records Administration (NARA) has with Ancestry.com (formerly The Generations Network). If you have an interest in such details, you might want to read the document referenced in this announcement from NARA:
The National Archives and Records Administration (NARA) is giving public notice that we are proposing an addendum to the May 20, 2008, digitization agreement with The Generations Network, Inc. (TGN) to engage in digitization of archival materials at a location other than a "NARA location" as specified in section 1.2 of the agreement. Specifically, this Addendum approves the Ancestry.com-Silver Spring, MD, facility as suitable for the ongoing digitizing of Archival Materials, and provides the operative terms under which digitization at that facility may be performed.
Please go to http://www.archives.gov/comment/generations-network.html for an overview of the proposed draft addendum and a link to the original agreement. NARA will be accepting comments through August 31, 2009.