Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
any unauthorised use of the services is strictly prohibited and will terminate the licence granted in these terms . 

```
. OPTIONS: ['Arbitration' 'Contract by using' 'Choice of law' 'Unilateral change'
 'Content removal' 'None' 'Jurisdiction' 'Limitation of liability'
 'Unilateral termination'].