The main library/crate is licensed under the MPL-2.0, which can be found at ./LICENSES/MPL-2.0.txt
The specification (SPECIFICATION.md) is licensed under the GFDL-1.3-or-later, which can be found at ./LICENSES/GFDL-1.3-or-later.txt
The command line tool (./cli) is licensed under the GPL-3.0-or-later, which can be found at ./LICENSES/GPL-3.0-or-later.txt