What must be disclosed to the ethics partner if fees from a client exceed 10% but are below 15%?

When fees from a client exceed 10% but are below 15%, it is crucial to disclose this information to the ethics partner as part of the firm's commitment to maintaining independence and adhering to ethical standards. The rationale behind this requirement lies in the potential threat to auditor independence that can arise when a significant portion of fees is derived from a single client.

An independent quality control review is necessary in this situation to ensure that the audit process remains free from bias or compromise due to the financial dependence on that client. By disclosing this information, the firm can initiate a review process that assesses whether adequate safeguards are in place to mitigate any threats to independence. This review is an essential component of quality assurance within audit practices, ensuring that the integrity of the audit is maintained even when there are significant fee relationships.

In contrast, other options like self-review safeguards, materiality reassessment, or informed management may not directly address the specific ethical considerations related to the level of fees from a client. Therefore, emphasizing the need for an independent quality control review becomes paramount, as it relates directly to preserving the objectivity and integrity of the audit work carried out.