When a user attempts to add or modify expression code, the system will perform an additional check to verify that the user is a member of at least one of these three groups defined in the Site context. If the user is not a member of at least one of these three groups, all expression code input fields in the Workflow Template Editor will be disabled. Furthermore, the workflow service will prevent saving a template with modified expression code, in cases where the workflow template may be created through other means.