National Health Insurance Act Article 25

The Insurer shall make the actuarial process at least once every five years for the insurance premium finance, with each such actuarial process covering a period of 25 years.
中文原文 全民健康保險法第25條
本保險財務,由保險人至少每五年精算一次;每次精算二十五年。

English translation for reference only; the Chinese text prevails. Not legal advice.