Unfair contract term under the Australian Consumer Law

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This is a benchmarking hypothetical, not legal advice. The law is as at FY2025-26 (Commonwealth). A consumer signs a standard-form contract with an online subscription business. The consumer had no opportunity to negotiate the wording. One clause reads: "The supplier may vary the monthly fee payable by the consumer at any time, in any amount, at the supplier's sole discretion, without notice. The consumer has no right to terminate the contract if the fee is varied." Assume the contract is a consumer contract and a standard-form contract for the purposes of the unfair contract terms regime. Answer in two parts: (a) State your classification of this clause on one line, beginning with "Classification:" and then the single word fair or unfair. (b) Name the controlling statute and the section that sets out the test for whether a term is unfair.