# Document history
<a name="document-revisions"></a>

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| Change | Description | Date | 
| --- |--- |--- |
| [Whitepaper updated](#document-revisions) | Updated with guidance on how to use resource control policies (RCPs) and `aws:SourceOrgID` condition key to establish a data perimeter | November 13, 2024 | 
| [Whitepaper updated](#document-revisions) | Updated to centralize all policy examples in the AWS policy example repo | June 12, 2023 | 
| [Whitepaper updated](#document-revisions) | Updated to add guidance for using `aws:ResourceOrgID`, added additional policy examples, and organizational updates | April 26, 2022 | 
| [Whitepaper updated](#document-revisions) | Content and policy example updates | September 8, 2021 | 
| [Initial publication](#document-revisions) | Whitepaper first published | July 1, 2021 | 

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