20. A candidate who fails the examination is entitled to 2 supplemental examinations in the next 2 years. He must, where applicable, include with his registration a document certifying that he has completed additional postdoctoral training.
Notwithstanding the foregoing, the candidate who demonstrates to the committee that he was unable to take the supplemental examinations within the prescribed period because of illness, accident, pregnancy, death of a member of his immediate family or superior force must be granted an additional period of time to take a supplemental examination to comply with those conditions equivalent to the period during which he was unable to complete the supplemental examination but not exceeding one year.