Labor Insurance Act Article 56

If, in reviewing a claim for permanent disability benefits, the insurer deems it is necessary to conduct a re-examination, another hospital or doctor may be appointed for the re-examination and the fee for the re-examination is the obligation of insurance fund.After the insured person claimed and got disability pension, the insurer should review the degree of disability at least every five years except for unnecessary to review the disability from the insurer.If the insurer reviews the degree of disability on those who have claimed permanent disability pension according to the former paragraph and finds the disability has been reduced and does not conform to the criteria for claiming permanent disability pension, the insurer should stop issuing permanent disability pension benefit and grant a lump sum permanent disability benefit.
中文原文 勞工保險條例第56條
保險人於審核失能給付,認為有複檢必要時,得另行指定醫院或醫師複檢,其費用由保險基金負擔。
被保險人領取失能年金給付後,保險人應至少每五年審核其失能程度。
但經保險人認為無須審核者,不在此限。
保險人依前項規定審核領取失能年金給付者之失能程度,認為已減輕至不符合失能年金請領條件時,應停止發給其失能年金給付,另發給失能一次金。

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