Comprehensive and Detailed In-Depth Explanation:

According to ISO 19011:2018, Clause 5.5 (Determining Audit Team Competence), technical experts:

Provide specialized knowledge in an audit.

Must operate under the supervision of an auditor to ensure compliance with audit protocols.

Cannot work independently or under the auditee’s supervision, as they are not responsible for the audit's findings.

The audit team leader has overall responsibility, but technical experts are supervised by an auditor during the audit process.