Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
behaviour is considered utterly unacceptable in case of serious violations of the nintendo code of conduct and other important provisions of this agreement . 

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