Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
because requirements may change at any time , be sure to check for up-to-date information before booking and departure . 

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