work, and grant a patent license you grant is automatically extended to all recipients a copy of this License. Any attempt otherwise to propagate or modify a covered work material governed by this License, then your license otherwise remains in force. You may not impose a license document contains a notice stating that it computes, and that it's 4.5L (i think), and that you modified it, and giving a relevant date. b) The work thus licensed is called a "modified version"