A company uses AWS Control Tower to deploy multiple AWS accounts.

Create CloudFormation templates per guardrail stored in CodeCommit. Use AWS::ControlTower::EnableControl resources. Automate via CodeBuild.

Same as A but for each account.

Store CloudFormation templates per guardrail in a Git repo. Use CodePipeline in the security account with EventBridge triggering deployments.

Store templates in S3 and trigger deployment with EventBridge PutObject.