http://modxcms.com/develop/contribute/cla.html
When you have finished filling out the CLA, you may submit it to the MODx Project one of the following ways:
That link (
http://modxcms.com/develop/contribute/individual-cla.pdf) gives me a "File damaged" error in Adobe. While the
http://modxcms.com/assets/documents/cla-individual.pdf link earlier in the text works fine.