2020-03-13 15:44:24 +05:30
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---
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type: reference, concepts
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---
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# Instance-level merge request approval rules **(PREMIUM ONLY)**
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> Introduced in [GitLab Premium](https://gitlab.com/gitlab-org/gitlab/issues/39060) 12.8.
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Merge request approvals rules prevent users overriding certain settings on a project
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level. When configured, only administrators can change these settings on a project level
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if they are enabled at an instance level.
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To enable merge request approval rules for an instance:
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1. Navigate to **{admin}** **Admin Area >** **{push-rules}** **Push Rules** and expand **Merge
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requests approvals**.
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1. Set the required rule.
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1. Click **Save changes**.
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GitLab administrators can later override these settings in a project’s settings.
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## Available rules
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Merge request approval rules that can be set at an instance level are:
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2020-04-22 19:07:51 +05:30
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- **Prevent approval of merge requests by merge request author**. Prevents project
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maintainers from allowing request authors to merge their own merge requests.
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- **Prevent approval of merge requests by merge request committers**. Prevents project
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maintainers from allowing users to approve merge requests if they have submitted
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any commits to the source branch.
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- **Prevent users from modifying merge request approvers list**. Prevents project
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maintainers from allowing users to modify the approvers list in project settings
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or in individual merge requests.
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