Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
please see section 512 ( c ) ( 3 ) of title 17 of the us code ( available at http://www.copyright.gov/title17/92chap5.html#512 ) for the requirements of a proper notification . 

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