Common use of Modifications and Derivative Works Clause in Contracts

Modifications and Derivative Works. You may modify the software, and use it to create derivative works, for your internal use at the site covered by this license. You may not distribute such modified or derivative software to others outside of your site without written permission. You may distribute the modifications themselves (e.g. as "patches") under terms of your choice. We encourage users to contribute modifications back into Amber, but you are under no obligation to do so.