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---
type: reference, concepts
---
# Instance-level merge request approval rules **(PREMIUM ONLY)**
> Introduced in [GitLab Premium](https://gitlab.com/gitlab-org/gitlab/issues/39060) 12.8.
Merge request approvals rules prevent users overriding certain settings on a project
level. When configured, only administrators can change these settings on a project level
if they are enabled at an instance level.
To enable merge request approval rules for an instance:
1. Navigate to **{admin}** **Admin Area >** **{push-rules}** **Push Rules** and expand **Merge
requests approvals**.
1. Set the required rule.
1. Click **Save changes**.
GitLab administrators can later override these settings in a project’s settings.
## Available rules
Merge request approval rules that can be set at an instance level are:
- **Prevent approval of merge requests by merge request author**. Prevents non-admins
from allowing merge request authors to merge their own merge requests in individual
projects.
- **Prevent approval of merge requests by merge request committers**. Prevents
non-admins from allowing merge request committers to merge merge requests they were
committing to in individual projects.
- **Prevent users from modifying merge request approvers list**. Prevents non-admins
from modifying approvers list in project settings and in individual merge requests.
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