Description of delegated administration and policy
This topic describes the delegation of access control administration and policy, and gives an example of the delegated administrative policy.
WebSphere Portal supports delegated access control administration. An administrator is a user who is authorized to modify the access control configuration by changing role assignments and creating or deleting role blocks. Administrators can delegate specific subsets of their administrative privileges to other users or groups. These users or groups can in turn delegate subsets of their privileges to additional users and groups. The delegated administration policy determines how users are permitted to delegate their privileges.
via WebSphere Portal Family wiki: IBM WebSphere Portal 7 Product Documentation: Delegated Access Control Administration.