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