What does the term 'legally acceptable representative' refer to?

• A. The participant's employer.
• B. A random bystander.
• C. An individual authorized to provide consent on behalf of a participant unable to do so.
• D. The research sponsor.

Answer: (C)

Legally acceptable representative refers to the person who has the legal authority to give informed consent on behalf of a participant who cannot consent for themselves. This is usually a parent or legal guardian for a child, or a legally authorized representative for an adult lacking decision-making capacity, as defined by applicable laws and the study’s procedures. The representative’s authority should be documented and validated according to local regulations and IRB/IEC requirements, ensuring the participant’s rights and welfare are protected. An employer, random bystander, or sponsor does not have the authority to consent for the participant in a research study.