Payment Standards of the Compulsory Automobiles Liability Insurance Article 5

If the original disable condition of the injured party becomes more serious because of an automobile traffic accident, the difference shall be paid the worse disability benefit deducting that for the original injury.If the injured party has received original disability benefit and the disability becomes serious to aggravate in disability degree or even loss of life due to the same automobile traffic accident, the difference shall be paid with the same way subject to the preceding paragraph.
中文原文 強制汽車責任保險給付標準第5條
受害人因汽車交通事故,致原有失能程度加重,應按加重之失能等級給付標準扣除原失能給付標準給與之。
受害人因同一交通事故已受領失能給付,後因原障害部位惡化而加重失能程度或死亡者,比照前項扣除已領失能給付方式給與之。

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