diff --git a/packages/django-google-spanner/CONTRIBUTING.md b/packages/django-google-spanner/CONTRIBUTING.md
deleted file mode 100644
index 2b19390a48ef..000000000000
--- a/packages/django-google-spanner/CONTRIBUTING.md
+++ /dev/null
@@ -1,25 +0,0 @@
-# How to Contribute
-
-## Contributor License Agreement
-
-Contributions to this project must be accompanied by a Contributor License
-Agreement. You (or your employer) retain the copyright to your contribution;
-this simply gives us permission to use and redistribute your contributions as
-part of the project. Head over to <https://cla.developers.google.com/> to see
-your current agreements on file or to sign a new one.
-
-You generally only need to submit a CLA once, so if you've already submitted one
-(even if it was for a different project), you probably don't need to do it
-again.
-
-## Code reviews
-
-All submissions, including submissions by project members, require review. We
-use GitHub pull requests for this purpose. Consult
-[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
-information on using pull requests.
-
-## Community Guidelines
-
-This project follows [Google's Open Source Community
-Guidelines](https://opensource.google/conduct/).
diff --git a/packages/django-google-spanner/CONTRIBUTING.rst b/packages/django-google-spanner/CONTRIBUTING.rst
new file mode 100644
index 000000000000..4d6e87dd6421
--- /dev/null
+++ b/packages/django-google-spanner/CONTRIBUTING.rst
@@ -0,0 +1,11 @@
+############
+Contributing
+############
+
+This package is part of the ``google-cloud-python`` monorepo.
+
+Please refer to the centralized `Contributing Guide`_ at the repository root for general guidelines on how to contribute, set up your development environment, and submit pull requests.
+
+.. _Contributing Guide: https://github.com/googleapis/google-cloud-python/blob/main/CONTRIBUTING.rst
+
+Package-specific test sessions are defined in this directory's ``noxfile.py``. Dependencies and supported Python versions are defined in ``setup.py`` or ``pyproject.toml``.
diff --git a/packages/googleapis-common-protos/CONTRIBUTING.md b/packages/googleapis-common-protos/CONTRIBUTING.md
deleted file mode 100644
index b16a4668cb64..000000000000
--- a/packages/googleapis-common-protos/CONTRIBUTING.md
+++ /dev/null
@@ -1,29 +0,0 @@
-# How to Contribute
-
-We'd love to accept your patches and contributions to this project. There are
-just a few small guidelines you need to follow.
-
-## Contributor License Agreement
-
-Contributions to this project must be accompanied by a Contributor License
-Agreement (CLA). You (or your employer) retain the copyright to your
-contribution; this simply gives us permission to use and redistribute your
-contributions as part of the project. Head over to
-<https://cla.developers.google.com/> to see your current agreements on file or
-to sign a new one.
-
-You generally only need to submit a CLA once, so if you've already submitted one
-(even if it was for a different project), you probably don't need to do it
-again.
-
-## Code reviews
-
-All submissions, including submissions by project members, require review. We
-use GitHub pull requests for this purpose. Consult
-[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
-information on using pull requests.
-
-## Community Guidelines
-
-This project follows
-[Google's Open Source Community Guidelines](https://opensource.google/conduct/).
\ No newline at end of file
diff --git a/packages/googleapis-common-protos/CONTRIBUTING.rst b/packages/googleapis-common-protos/CONTRIBUTING.rst
new file mode 100644
index 000000000000..4d6e87dd6421
--- /dev/null
+++ b/packages/googleapis-common-protos/CONTRIBUTING.rst
@@ -0,0 +1,11 @@
+############
+Contributing
+############
+
+This package is part of the ``google-cloud-python`` monorepo.
+
+Please refer to the centralized `Contributing Guide`_ at the repository root for general guidelines on how to contribute, set up your development environment, and submit pull requests.
+
+.. _Contributing Guide: https://github.com/googleapis/google-cloud-python/blob/main/CONTRIBUTING.rst
+
+Package-specific test sessions are defined in this directory's ``noxfile.py``. Dependencies and supported Python versions are defined in ``setup.py`` or ``pyproject.toml``.