Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
certain software , content , or areas of the service may be subject to certain age requirements , as specified in an applicable product policy . 

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