The Tails source code is released under the GNU/GPL (version 3 or above) and is Copyright (C) Tails developers <foundations@tails.net>.Any exception to this rule is documented either below or in the affected source file.
The source code of the Debian packages included in Tails is available in the [APT snapshot](https://tagged.snapshots.deb.tails.boum.org/)that we created for that version of Tails.