“Child sexual abuse often takes place persistently over an extended period, but victims still have to recall and describe them all one by one,” she said. “It is not only challenging but also unreasonable to victims … if they are subject to the same set of requirements as others.”

Chong called on authorities to consider following the example of Australia, which only requires prosecutors to prove the defendant committed an unlawful sexual act more than three times, or twice in some states, within a specified period.