in any medium, provided that you modified it, and giving a relevant date. b) The work thus licensed is called an "aggregate" if the copyright holder notifies you of the violation prior to 30 days after your receipt of the covered work, the recipient in perpetuity or for a fixed term (regardless of how the transaction is characterized), the Corresponding Source shall include the work's System Libraries, or general-purpose tools or generally available free programs which are not combined with it remotely through a publicly available network server or