Each Common Paper standard agreement consists of a cover page and standard terms. The cover page has customization options for a particular company and/or deal, but the standard terms don't. More on the structure of the agreements in this article.
The standard terms are designed to be immutable. Thousands of companies have reviewed and signed agreements that contain the standard terms, and keeping the standard terms the same allows those companies to review and sign new agreements with the same standard terms much faster.
The agreements can be customized while keeping the standard terms intact using variables in the cover page and the “Other Changes to the Standard Terms” section. You can see how in this article.
All that said, the agreements are released under the Creative Commons CC-BY 4.0 license. If you do download one of the agreements and make changes to the standard terms under the CC BY 4.0 license, we suggest that you describe the terms using language like “Derived from the Common Paper CSA v1.0 Standard Terms” rather than labeled as the original standard terms themselves. This will ensure your counterparty knows that they are reviewing something different from the original standard agreement and can’t rely on the language being the same.