Update legal.md

_articles/legal.md

@@ -12,17 +12,17 @@ related:
 
 ## Understanding the legal implications of open source
 
-Sharing your creative work with the world can be an exciting and rewarding experience. It can also mean a bunch of legal things you didn't know you had to worry about. Thankfully, you don't have to start from scratch. We've got your legal needs covered. (Before you dig in, be sure to read our [disclaimer](/notices/).)
+Sharing your creative work with the world can be an exciting and rewarding experience. It can also mean a bunch of legal things you didn't know you had to worry about. Thankfully, with this guide you don't have to start from scratch. (Before you dig in, be sure to read our [disclaimer](/notices/).)
 
 ## Why do people care so much about the legal side of open source?
 
 Glad you asked! When you make a creative work (such as writing, graphics, or code), that work is under exclusive copyright by default. That is, the law assumes that as the author of your work, you have a say in what others can do with it.
 
 In general, that means nobody else can use, copy, distribute, or modify your work without being at risk of take-downs, shake-downs, or litigation.
 
-Open source is an unusual circumstance, however, because the author expects that others will use, modify, and share the work. But because the legal default is still exclusive copyright, you need a license that explicitly states these permissions.
+Open source is an unusual circumstance, however, because the author expects that others will use, modify, and share the work. But because the legal default is still exclusive copyright, you need to explicitly give these permissions with a license.
 
-If you don't apply an open source license, everybody who contributes to your project also becomes an exclusive copyright holder of their work. That means nobody can use, copy, distribute, or modify their contributions -- and that "nobody" includes you.
+These rules also apply when someone contributes to your project. Without a license or other agreement in place, any contributions are exclusively owned by their authors. That means nobody -- not even you -- can use, copy, distribute, or modify their contributions.
 
 Finally, your project may have dependencies with license requirements that you weren't aware of. Your project's community, or your employer's policies, may also require your project to use specific open source licenses. We'll cover these situations below.
 
@@ -40,7 +40,7 @@ If you want others to use, distribute, modify, or contribute back to your projec
 
 You're in luck, because today, open source licenses are standardized and easy to use. You can copy-paste an existing license directly into your project.
 
-[MIT](https://choosealicense.com/licenses/mit/), [Apache 2.0](https://choosealicense.com/licenses/apache-2.0/), and [GPLv3](https://choosealicense.com/licenses/gpl-3.0/) are the most popular open source licenses, but there are other options to choose from. You can find the full text of these licenses, and instructions on how to use them, on [choosealicense.com](https://choosealicense.com/).
+[MIT](https://choosealicense.com/licenses/mit/), [Apache 2.0](https://choosealicense.com/licenses/apache-2.0/), and [GPLv3](https://choosealicense.com/licenses/gpl-3.0/) are [popular open source licenses](https://innovationgraph.github.com/global-metrics/licenses), but there are other options to choose from. You can find the full text of these licenses, and instructions on how to use them, on [choosealicense.com](https://choosealicense.com/).
 
 When you create a new project on GitHub, you'll be [asked to add a license](https://help.github.com/articles/open-source-licensing/).
 
@@ -54,21 +54,23 @@ When you create a new project on GitHub, you'll be [asked to add a license](http
 
 ## Which open source license is appropriate for my project?
 
-If you're starting from a blank slate, it's hard to go wrong with the [MIT License](https://choosealicense.com/licenses/mit/). It's short, very easy to understand, and allows anyone to do anything so long as they keep a copy of the license, including your copyright notice. You'll be able to release the project under a different license if you ever need to.
+It's hard to go wrong with the [MIT License](https://choosealicense.com/licenses/mit/) if you're starting with a blank slate. It's short, easily understood, and allows anyone to do anything so long as they keep a copy of the license, including your copyright notice. You'll be able to release the project under a different license if you ever need to.
 
 Otherwise, picking the right open source license for your project depends on your objectives.
 
-Your project very likely has (or will have) **dependencies**. For example, if you're open sourcing a Node.js project, you'll probably use libraries from the Node Package Manager (npm). Each of those libraries you depend on will have its own open source license. If each of their licenses is "permissive" (gives the public permission to use, modify, and share, without any condition for downstream licensing), you can use any license you want. Common permissive licenses include MIT, Apache 2.0, ISC, and BSD.
+Your project very likely has (or will have) **dependencies**, each of which will have its own open source license with terms you have to respect. For example, if you're open sourcing a Node.js project, you'll probably use libraries from the Node Package Manager (npm).
 
-On the other hand, if any of your dependencies' licenses are "strong copyleft" (also gives public same permissions, subject to condition of using the same license downstream), then your project will have to use the same license. Common strong copyleft licenses include GPLv2, GPLv3, and AGPLv3.
+Dependencies with **permissive licenses** like [MIT](https://choosealicense.com/licenses/mit/), [Apache 2.0](https://choosealicense.com/licenses/apache-2.0/), [ISC](https://choosealicense.com/licenses/isc), and [BSD](https://choosealicense.com/licenses/bsd-3-clause) allow you to license your project however you want.
 
+Dependencies with **copyleft licenses** require closer attention. Including any library with a "strong" copyleft license like the [GPLv2](https://choosealicense.com/licenses/gpl-2.0), [GPLv3](https://choosealicense.com/licenses/gpl-3.0), or [AGPLv3](https://choosealicense.com/licenses/agpl-3.0) requires you to choose an identical or [compatible license](https://www.gnu.org/licenses/license-list.en.html#GPLCompatibleLicenses) for your project. Libraries with a "limited" or "weak" copyleft license like the [MPL 2.0](https://choosealicense.com/licenses/mpl-2.0/) and [LGPL](https://choosealicense.com/licenses/lgpl-3.0/) can be included in projects with any license, provided you follow the [additional rules](https://fossa.com/blog/all-about-copyleft-licenses/#:~:text=weak%20copyleft%20licenses%20also%20obligate%20users%20to%20release%20their%20changes.%20however%2C%20this%20requirement%20applies%20to%20a%20narrower%20set%20of%20code.) they specify.
+
 You may also want to consider the **communities** you hope will use and contribute to your project:
 
 * **Do you want your project to be used as a dependency by other projects?** Probably best to use the most popular license in your relevant community. For example, [MIT](https://choosealicense.com/licenses/mit/) is the most popular license for [npm libraries](https://libraries.io/search?platforms=NPM).
-* **Do you want your project to appeal to large businesses?** A large business will likely want an express patent license from all contributors. In this case, [Apache 2.0](https://choosealicense.com/licenses/apache-2.0/) has you (and them) covered.
+* **Do you want your project to appeal to large businesses?** A large business may be comforted by an express patent license from all contributors. In this case, the [Apache 2.0](https://choosealicense.com/licenses/apache-2.0/) (and them) covered.
 * **Do you want your project to appeal to contributors who do not want their contributions to be used in closed source software?** [GPLv3](https://choosealicense.com/licenses/gpl-3.0/) or (if they also do not wish to contribute to closed source services) [AGPLv3](https://choosealicense.com/licenses/agpl-3.0/) will go over well.
 
-Your **company** may have specific licensing requirements for its open source projects. For example, it may require a permissive license so that the company can use your project in the company's closed source product. Or your company may require a strong copyleft license and an additional contributor agreement (see below) so that only your company, and nobody else, can use your project in closed source software. Or your company may have certain needs related to standards, social responsibility, or transparency, any of which could require a particular licensing strategy. Talk to your [company's legal department](#what-does-my-companys-legal-team-need-to-know).
+Your **company** may have policies for open source project licensing. Some companies require your projects to bear a permissive license to permit integration with the company's proprietary products. Other policies enforce a strong copyleft license and an additional contributor agreement ([see below](#does-my-project-need-an-additional-contributor-agreement)) so only your company can use the project in closed source software. Organizations may also have certain standards, social responsibility goals, or transparency needs which could require a particular licensing strategy. Talk to your [company's legal department](#what-does-my-companys-legal-team-need-to-know) for guidance.
 
 When you create a new project on GitHub, you are given the option to select a license. Including one of the licenses mentioned above will make your GitHub project open source. If you'd like to see other options, check out [choosealicense.com](https://choosealicense.com) to find the right license for your project, even if it [isn't software](https://choosealicense.com/non-software/).
 
@@ -82,9 +84,9 @@ For example, as your project grows it adds dependencies or users, or your compan
 
 **Your project's existing license.** If your project's existing license is compatible with the license you want to change to, you could just start using the new license. That's because if license A is compatible with license B, you'll comply with the terms of A while complying with the terms of B (but not necessarily vice versa). So if you're currently using a permissive license (e.g., MIT), you could change to a license with more conditions, so long as you retain a copy of the MIT license and any associated copyright notices (i.e., continue to comply with the MIT license's minimal conditions). But if your current license is not permissive (e.g., copyleft, or you don't have a license) and you aren't the sole copyright holder, you couldn't just change your project's license to MIT. Essentially, with a permissive license the project's copyright holders have given permission in advance to change licenses.
 
-**Your project's existing copyright holders.** If you're the sole contributor to your project then either you or your company is the project's sole copyright holder. You can add or change to whatever license you or your company wants to. Otherwise there may be other copyright holders that you need agreement from in order to change licenses. Who are they? People who have commits in your project is a good place to start. But in some cases copyright will be held by those people's employers. In some cases people will have only made minimal contributions, but there's no hard and fast rule that contributions under some number of lines of code are not subject to copyright. What to do? It depends. For a relatively small and young project, it may be feasible to get all existing contributors to agree to a license change in an issue or pull request. For large and long-lived projects, you may have to seek out many contributors and even their heirs. Mozilla took years (2001-2006) to relicense Firefox, Thunderbird, and related software.
+**Your project's existing copyright holders.** If you're the sole contributor to your project then either you or your company is the project's sole copyright holder. You can add or change to whatever license you or your company wants to. Otherwise there may be other copyright holders that you need agreement from in order to change licenses. Who are they? [People who have commits in your project](https://github.com/thehale/git-authorship) is a good place to start. But in some cases copyright will be held by those people's employers. In some cases people will have only made minimal contributions, but there's no hard and fast rule that contributions under some number of lines of code are not subject to copyright. What to do? It depends. For a relatively small and young project, it may be feasible to get all existing contributors to agree to a license change in an issue or pull request. For large and long-lived projects, you may have to seek out many contributors and even their heirs. Mozilla took years (2001-2006) to relicense Firefox, Thunderbird, and related software.
 
-Alternatively, you can have contributors agree in advance (via an additional contributor agreement -- see below) to certain license changes under certain conditions, beyond those allowed by your existing open source license. This shifts the complexity of changing licenses a bit. You'll need more help from your lawyers up front, and you'll still want to clearly communicate with your project's stakeholders when executing a license change.
+Alternatively, you can have contributors pre-approve certain license changes via an additional contributor agreement ([see below](#does-my-project-need-an-additional-contributor-agreement)). This shifts the complexity of changing licenses a bit. You'll need more help from your lawyers up front, and you'll still want to clearly communicate with your project's stakeholders when executing a license change.
 
 ## Does my project need an additional contributor agreement?
 
@@ -120,11 +122,11 @@ For better or worse, consider letting them know even if it's a personal project.
 
 **If you're open sourcing a project for your company,** then definitely let them know. Your legal team probably already has policies for what open source license (and maybe additional contributor agreement) to use based on the company's business requirements and expertise around ensuring your project complies with the licenses of its dependencies. If not, you and they are in luck! Your legal team should be eager to work with you to figure this stuff out. Some things to think about:
 
-* **Third party material:** Does your project have dependencies created by others or otherwise include or use others' code? If these are open source, you'll need to comply with the materials' open source licenses. That starts with choosing a license that works with the third party open source licenses (see above). If your project modifies or distributes third party open source material, then your legal team will also want to know that you're meeting other conditions of the third party open source licenses such as retaining copyright notices. If your project uses others' code that doesn't have an open source license, you'll probably have to ask the third party maintainers to [add an open source license](https://choosealicense.com/no-license/#for-users), and if you can't get one, stop using their code in your project.
+* **Third party material:** Does your project have dependencies created by others or otherwise include or use others' code? If these are open source, you'll need to comply with the materials' open source licenses. That starts with choosing a license that works with the third party open source licenses ([see above](#which-open-source-license-is-appropriate-for-my-project)). If your project modifies or distributes third party open source material, then your legal team will also want to know that you're meeting other conditions of the third party open source licenses such as retaining copyright notices. If your project uses others' code that doesn't have an open source license, you'll probably have to ask the third party maintainers to [add an open source license](https://choosealicense.com/no-license/#for-users), and if you can't get one, stop using their code in your project.
 
 * **Trade secrets:** Consider whether there is anything in the project that the company does not want to make available to the general public. If so, you could open source the rest of your project, after extracting the material you want to keep private.
 
-* **Patents:** Is your company applying for a patent of which open sourcing your project would constitute [public disclosure](https://en.wikipedia.org/wiki/Public_disclosure)? Sadly, you might be asked to wait (or maybe the company will reconsider the wisdom of the application). If you're expecting contributions to your project from employees of companies with large patent portfolios, your legal team may want you to use a license with an express patent grant from contributors (such as Apache 2.0 or GPLv3), or an additional contributor agreement (see above).
+* **Patents:** Is your company applying for a patent of which open sourcing your project would constitute [public disclosure](https://en.wikipedia.org/wiki/Public_disclosure)? Sadly, you might be asked to wait (or maybe the company will reconsider the wisdom of the application). If you're expecting contributions to your project from employees of companies with large patent portfolios, your legal team may want you to use a license with an express patent grant from contributors (such as Apache 2.0 or GPLv3), or an additional contributor agreement ([see above](#which-open-source-license-is-appropriate-for-my-project)).
 
 * **Trademarks:** Double check that your project's name [does not conflict with any existing trademarks](../starting-a-project/#avoiding-name-conflicts). If you use your own company trademarks in the project, check that it does not cause any conflicts. [FOSSmarks](http://fossmarks.org/) is a practical guide to understanding trademarks in the context of free and open source projects.