Lars Hellström writes:
 > Concerning the matter of stating intent, perhaps something like the
 > following could be included in the preamble?
 >
 >   The purpose of this License is to grant The User the right to
 >   freely obtain, use, and make derivative works based on The Program,
 >   whilst at the same time preserving the integrety of The Program.
 >   This means that derivative works created by modifying The Program
 >   (or any part thereof) must not give the appearance of being part
 >   of The Program. The right to modify The Program for the purpose of
 >   creating a new version of The Program lies solely with the Current
 >   Maintainer of The Program.

just reading the whole license again (helps sometimes :-) isn't the above not
already covered by

  We, the LaTeX3 Project, believe that the conditions below give you
  the freedom to make and distribute modified versions of The Program
  that conform with whatever technical specifications you wish while
  maintaining the availability, integrity, and reliability of
  The Program.  If you do not see how to achieve your goal while
  meeting these conditions, then read the document `cfgguide.tex'
  in the base LaTeX distribution for suggestions.

?

frank