Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
we will use the child 's e-mail address only for the purpose for which it was collected , and we will use the e-mail address of the parent ( s ) or guardian ( s ) only to provide notification about the child 's contact with us , and to provide notification of the types and uses of personal data collected , if and as required by law . 

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