Regulations Governing Subrogation Claims under the National Health Insurance for Public Safety Incidents, Major Traffic Accidents, Public Nuisance Events, and Food Poisoning Incidents Article 10

For any situation that meets the requirements prescribed in Article 5, the Insurer shall make a formal decision on whether to pursue subrogation within six (6) months from the date benefits are first provided, and notify the victim and the Third Party or liability Insurer in writing.
中文原文 全民健康保險執行公共安全事故與重大交通事故公害及食品中毒事件代位求償辦法第10條
保險人對符合第五條規定之情事者,應於提供該保險給付之日起六個月內,就其是否求償,作成正式確認,並將結果以書面通知受害人與第三人或責任保險人。

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