Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you may not assign or otherwise transfer your airbnb account to another party . 

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