Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
22.6 you may not assign , transfer or delegate this agreement and your rights and obligations hereunder without airbnb 's prior written consent . 

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