User's Manual

144
You may charge a fee for the physical act of transferring a
copy, and you may at your option offer warranty protection
in exchange for a fee.
2. You may modify your copy or copies of the Program
or any portion of it, thus forming a work based on the

work under the terms of Section 1 above, provided that

  

any change.
  
publish, that in whole or in part contains or is derived from
the Program or any part thereof, to be licensed as a whole
at no charge to all third parties under the terms of this
License.
  
interactively when run, you must cause it, when started
running for such interactive use in the most ordinary
way, to print or display an announcement including an
appropriate copyright notice and a notice that there is

and that users may redistribute the program under these
conditions, and telling the user how to view a copy of this

but does not normally print such an announcement, your
work based on the Program is not required to print an
