Re: Double license PIE under Apache License and GPL2?
Drupal.org policy is even more restrictive - it's not allowed to bundle third-party libraries with modules, and in case of themes, bundled libraries must be licensed under GPL2 or later.http://drupal.org/node/272652
Anything that is contributed to Drupal, either as a patch or checked into CVS, must be under the same license as Drupal itself, GPL version 2 or later. While it is permitted to mix Drupal and code under, say, a BSD license, it can be confusing if you don't know which code can or cannot then be redistributed under some other license. Therefore, Drupal's CVS policy is "if it comes out of CVS, it's GPL version 2 or later. If you are not OK with that, don't commit it to CVS."
All code must be licensed under GNU/GPL Version 2 or later. If there is a problem with this, contact the repository administrators.