# Document history
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The following table describes significant changes to this guide. If you want to be notified about future updates, you can subscribe to an [RSS feed](https://docs.aws.amazon.com/prescriptive-guidance/latest/aws-multi-region-fundamentals/aws-multi-region-fundamentals.rss).

| Change | Description | Date | 
| --- |--- |--- |
| [Updates for ARC Region switch](#doc-history) | In sections [3.c](https://docs.aws.amazon.com/prescriptive-guidance/latest/aws-multi-region-fundamentals/fundamental-3.html#3c-failover-mechanism) and [4.d](https://docs.aws.amazon.com/prescriptive-guidance/latest/aws-multi-region-fundamentals/fundamental-4.html#4d-processes-procedures), added information about Amazon Application Recovery Controller (ARC) Region switch for handling recovery tasks. | September 29, 2025 | 
| [Updates](#doc-history) | Updates throughout the guide. | December 27, 2024 | 
| [Initial publication](#doc-history) | — | December 20, 2022 |