Authorization

Noun

1. An act of authorizing.
2. The state of being authorized to do something or to be somewhere; formally granted permission.

   "I've got authorization. Call the office and you'll see."

3. A document giving formal sanction, permission or warrant.

   "Can I see your authorization?"

4. Permission, possibly limited, to spend funds for a specific budgetary purpose.

   "We've had the authorization for years, but we've never gotten an appropriation."