Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
the application of the united nations convention on contracts for the international sale of goods ( cisg ) is excluded . 

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