# Considerations for using customer managed permissions in Amazon RAM
Customer managed permission considerations

Customer managed permissions are only available in the Amazon Web Services Region that you create them in. Not all resource types support customer managed permissions. For a list of supported resource types in Amazon Resource Access Manager, see [Shareable Amazon resources](shareable.md).

Customer managed permissions with multiple statements aren't supported. You can only use single non-negating operators in customer managed permissions.

The following conditions aren't supported in customer managed permissions:
+ Condition keys used to match properties of the principal:
  + `aws:PrincipalOrgId`
  + `aws:PrincipalOrgPaths`
  + `aws:PrincipalAccount`
+ Condition keys used to restrict access for service principals:
  + `aws:SourceArn`
  + `aws:SourceAccount`
  + `aws:SourceOrgPaths`
  + `aws:SourceOrgID`
+ System tags:
  + `aws:PrincipalTag/aws:`
  + `aws:ResourceTag/aws:`
  + `aws:RequestTag/aws:`

**Note**  
The `aws:SourceAccount` value is automatically populated when sharing to service principals.