On Sat, 30 May 2015 23:24:53 +0200 Ángel González <firstname.lastname@example.org> wrote: > On 30/05/15 03:30, Riley Baird wrote: > >>>> Only the copyright holder can change what a *work* is licensed as. > >> Unless the copyright holder grants the permission to do so, I would > >> say... > > Let's say I hold copyright on a work, and I grant someone else > > permission to change the license of a work. Who would enforce the > > second license? Only a copyright holder can enforce their copyrights. > IMHO you would be the one responsible for enforcing the license... Exactly. So, if a work is originally licensed under GPL-2+ and Person A makes a copy and gives it to Person B under GPL-3. Now consider that Person B gives a copy to Person C under GPL-2+. Person A can't enforce the original copyright holder's copyrights. I find it difficult to believe that the original copyright holder would enforce Person A's license. > unless you also > granted (delegated?) the right of enforcing the work license to someone > else. I'm not sure that you can grant the right of enforcing the license to someone else, otherwise why wouldn't copyleft authors just let give everyone the right to enforce their license?
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