Account:
- Root user login is tied to us-east-1 (during a us-east-1 outage, root user logins were broken) link
CloudFront:
- ACM certs must exist in us-east-1 for CloudFront to use them link
- Lambda functions used for Lambda@Edge must be deployed in us-east-1 link
- Control plane is only available in us-east-1 link
CloudTrial:
- For most global services, events are logged as occurring in us-east-1 link
CloudWatch:
- CloudWatch Billing metric data is stored in the US East (N. Virginia) Region and represents worldwide charges" link
IAM:
- Control plane is only available in us-east-1 link
Route53
- Control plane is only available in us-east-1 link
Nice find, added to the list