Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
we will notify our members of material changes to these terms and conditions by either sending a notice to the email address provided to us at registration or by placing a notice on our website . 

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