AWS GovCloud (US)
User Guide

Services in the AWS GovCloud (US) Region

The following sections describe the differences between the AWS GovCloud (US) Region and the standard AWS regions. They include links to documentation and describe the ITAR boundaries (where you can and can't enter or process ITAR-regulated data) for each service. ITAR-regulated data is permitted in most configuration data fields. However, some of the data fields, such as Amazon S3 bucket names or Amazon EC2 tags, cannot contain ITAR-regulated data. Also, some services, such as Amazon SNS, cannot process ITAR-regulated data at all.