Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
in many cities , hosts may have to register , get a permit or obtain a license before preparing food or serving alcohol for sale . 

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