Customs Act Article 52

I. Dutiable samples, articles for scientific research, experiments, and/or exhibition, costumes and paraphernalia of entertainment troupes, cinematographic equipment and supplies for making movies and/or television films, instruments and tools needed for installation and repair of machines, containers used for importing cargoes, finished products imported for repair and maintenance, and other articles approved by the MOF shall be exempt from customs duty, provided that they are to be re-exported abroad within six months following the date of importation or within the time limit approved by the MOF.II.If the goods referred to in the preceding paragraph require an extension to the period of re-exportation under special circumstances, an application for an extension stating the reasons shall be submitted to Customs at the port of importation along with relevant documents. If the re-exportation period is approved by the MOF, then such an application shall be submitted to the MOF.
中文原文 關稅法第52條
應徵關稅之貨樣、科學研究用品、試驗用品、展覽物品、遊藝團體服裝、道具、攝製電影電視之攝影製片器材、安裝修理機器必需之儀器、工具、盛裝貨物用之容器,進口整修、保養之成品及其他經財政部核定之物品,在進口之翌日起六個月內或於財政部核定之日期前,原貨復運出口者,免徵關稅。
前項貨物,因事實需要,須延長復運出口期限者,應於出口期限屆滿前,以書面敘明理由,檢附有關證件,向原進口地海關申請核辦;其復運出口期限如原係經財政部核定者,應向財政部申請核辦。

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