Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
persons under the age of 13 , or the equivalent minimum age in the relevant jurisdiction , are not permitted to access or use the fitbit service unless their parent has consented in accordance with applicable law . 

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