Ways in Which You Can Set Permissions
You can set the permissions on an asset in two ways:
Using the Permissions action in the user interface:
Using the “Set Instance and Profile Permissions” policy action:
You can use the Set Instance and Profile Permissions policy action in a design/change-time policy to automatically assign permissions to an asset during any of the following events:

Post-Create

Pre-State Change

Post-State Change

OnTrigger
For more information about creating policies, see the CentraSite User’s Guide. For more information about using the Set Instance and Profile Permissions action, see the CentraSite Developer’s Guide.