Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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if you are booking for an additional guest who is a minor , you represent and warrant that you are legally authorized to act on behalf of the minor . 

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