DUE TO SPAM, SIGN-UP IS DISABLED. Goto Selfserve wiki signup and request an account.

DUE TO SPAM, SIGN-UP IS DISABLED. Goto Selfserve wiki signup and request an account.
...
Other than that, customer should be able to define customized policies by grant or deny permission to customize permissions for the group. So far, for cross-account permission grant, we are currently supporting the following 3 types of granting/denying:
Here are list of entity types supported by IAM model:
A policy consists of set of Permissions. A Permission is a way of defining access control.
Using Permission, customer defines what actions are allowed or denied, on what resources, under which account or domain.
...