Refs #1209 -- clearly state the licensing requirements in the docs
diff --git a/docs/development/submitting-patches.rst b/docs/development/submitting-patches.rst
index fe2df43..54005d2 100644
--- a/docs/development/submitting-patches.rst
+++ b/docs/development/submitting-patches.rst
@@ -8,6 +8,9 @@
* Larger changes should be discussed on `our mailing list`_ before submission.
* New features and significant bug fixes should be documented in the
:doc:`/changelog`.
+* You must have legal permission to distribute any code you contribute to
+ ``cryptography``, and it must be available under both the BSD and Apache
+ Software License Version 2.0 licenses.
If you believe you've identified a security issue in ``cryptography``, please
follow the directions on the :doc:`security page </security>`.