Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
if you are booking for an additional guest who is a minor , you represent and warrant that you are legally authorized to act on behalf of the minor . 

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