To set up mandatory access control permissions, use the Mandatory Access Control tab on the Properties side panel:
NOTE. Setting up is available only if the mandatory access control method is selected.
Setting up mandatory access control parameters enables the user to assign access levels to the information stored in objects. Multiple selection is available for object classes to set up parameters on the Access Permissions side panel. After the permissions are determined, access permissions are set for each selected class object.
Determine the access level that limits the ability of a user or a user group to work with an object.
The Category column contains all access categories added in the Mandatory Access Control section.
In the Access Level column select object access level value for each category in the drop-down list.
Access permissions are set up after clicking the 
Dependent Objects button on the toolbar.
NOTE. Setting up permissions for dependent objects is available only for the selected object, on which other objects depend.
See also:
Access Control Settings | Setting Up Security Level Parameters