Johan Steenhoven developed an AWS Regional Resource Creation Policy Enforcement feature for the schubergphilis/terraform-aws-mcaf-landing-zone repository, focusing on governance and compliance across multi-account environments. He implemented this by updating Terraform policy files and JSON templates to restrict resource provisioning to a defined set of regions, with an explicit exemption for us-east-1. Using HCL and JSON, Johan ensured that the policy dynamically references allowed regions, strengthening organizational controls. The work addressed the need for standardized regional compliance, providing a clear mechanism for enforcing policy as code within AWS. Over the month, he delivered this feature without addressing any bug fixes.