You can now use AWS Resource Access Manager (AWS RAM) to share cluster resources across accounts in Amazon Route 53 Application Recovery Controller (Route 53 ARC). A cluster in Route 53 ARC is a set of five redundant endpoints in separate AWS Regions that you can use with API calls to manage failover for your multi-Region applications. When you opt to share a cluster across AWS accounts in your organization, teams can set up and operate failover controls using the same cluster independently.
Source:: Amazon AWS