Permissions are available to all Enterprise-level accounts.

Using permission policies, you can grant non-Admin users additional abilities in the Users View. For example, you can grant users the ability to view, create, and/or edit users. 

Permission policies are fully customizable, so you can control who receives permissions and what those permissions do. You can also limit permissions to specific subsets of users. For example, you may want to allow a Manager to only be able to view the users they manage.  

Contact if you are interested in using permissions in your account.