Migrating from ACS 4.x to ACS 5.3 ACS 4.x stores policy and authentication information, such as TACACS+ command sets, in the user and user group records. In ACS 5.3, policy and authentication information are independent shared components that you use as building blocks when you configure policies. Literature And Composition Jago Pdf. The most efficient way to make optimal use of the new policy model is to rebuild policies by using the building blocks, or policy elements, of the new policy model. This method entails creating appropriate identity groups, network device groups (NDGs), conditions, authorization profiles, and rules. ACS 5.3 provides a migration utility to transfer data from migration-supported versions of ACS 4.x to an ACS 5.3 machine.