Nuclear Damage Compensation Law Article 30

Any person who claims to have suffered nuclear damage and who has brought an action for compensation within the period applicable pursuant to the two preceding Articles may amend his/her claims to take into account any aggravation of the damage even if the statute of limitations has expired, provided that it is made before the closing of the oral argument in the first appeal.
中文原文 核子損害賠償法第30條
核子損害被害人,於前二條所定期間請求賠償者,在訴訟進行中,期間雖已屆滿,仍得就其加重之損害為訴訟之追加。
但以在第二審言詞辯論終結前者為限。

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