If you're deploying a new environment...
We encourage you to use the Landing Zone Accelerator on AWS solution, which incorporates the features of the Compliant Framework for Federal and DoD Workloads in AWS GovCloud (US) solution, plus additional AWS best practices and global compliance frameworks.
If you have active environments based on this AWS Solution...
You can continue to use this solution. AWS will no longer provide updates to the source code, such as integrating new AWS services and features or modernizing AWS Lambda toolchains. As a customer, you maintain full control of your content that you upload to the AWS services under your AWS account. Upon your initial solution deployment, a point-in-time replication of all source files runs from the public open-source into an AWS CodeCommit repository within your Management (Root) account.