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