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Contributions to the collaboration shall not be considered confidential. Each contributor represents and warrants that it has the right and authority to license copyright in its contributions to the collaboration Each contributor agrees to license the copyright in the contributions under the Modified (2-clause or 3-clause) BSD License or the Clear BSD License Skype Limited hereby separately grants to the contributors a license under its patents to the software contributed by Skype for internal evaluation and testing purposes only. This license expressly excludes use of the software for distribution or use in any commercial product or any commercial or production use whatsoever. See the IPR statement made to the IETF for details: http://datatracker.ietf.org/ipr/1297/