AWS announces the retirement of IAM actions for AWS Billing, Cost Management, and Account consoles under aws-portal service prefix, purchase-orders:ViewPurchaseOrders, and purchase-orders:ModifyPurchaseOrders and is replacing them with fine-grained service specific actions. This launch gives AWS customers more control over access to Billing, Cost Management, and Account services. These new permissions will also provide a single set of IAM actions that govern console and programmatic access to these services.
Source:: Amazon AWS