# Document history
<a name="doc-history"></a>

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/designing-control-tower-landing-zone/designing-control-tower-landing-zone.rss).

| Change | Description | Date | 
| --- |--- |--- |
| [Update](#doc-history) | In the [Managing the configuration of AWS resources](https://docs.aws.amazon.com/prescriptive-guidance/latest/designing-control-tower-landing-zone/config-mgmt.html) section, added information about the service-linked configuration aggregator (SLCA) in landing zone versions 4.0 and later.  | November 20, 2025 | 
| [Update](#doc-history) | Added information about managing AWS Config costs in the [Managing the configuration of AWS resources](https://docs.aws.amazon.com/prescriptive-guidance/latest/designing-control-tower-landing-zone/config-mgmt.html) section. | April 2, 2025 | 
| [New section](#doc-history) | Added information about [managing the configuration of AWS resources](https://docs.aws.amazon.com/prescriptive-guidance/latest/designing-control-tower-landing-zone/config-mgmt.html); updated Direct Connect details in the [Networking integration](https://docs.aws.amazon.com/prescriptive-guidance/latest/designing-control-tower-landing-zone/networking.html) section. | December 6, 2024 | 
| [Major update](#doc-history) | Significant changes and additions to all sections of the guide. | March 25, 2024 | 
| [Update](#doc-history) | Updated with the latest details on AWS Control Tower controls. | November 17, 2022 | 
| [—](#doc-history) | Initial publication | September 10, 2021 |