Which of the following statements correctly describes the legal requirement for witnesses giving oral evidence in court?

The notes state the general rule that evidence is given on oath or affirmation, while identifying exceptions such as certain children and document-producing witnesses. An affirmation is available in the circumstances described in the notes; the other options incorrectly eliminate affirmation or create a universal right to unsworn testimony. **Key takeaway:** Oath or affirmation is the general rule, not an absolute rule. **Glossary:** Affirmation: a formal non-religious or otherwise suitable solemn promise to tell the truth.