Culture and the Arts Reward and Promotion Act Article 30

The imported artifacts, works of art, and specimens to be shown at exhibitions or auctioned may be released before payment of duties and taxes if the domestic or the business/group holding the exhibition or auction who is not the taxpayer provides a letter of guarantee in lieu of a deposit to the Customs Administration.The imported artifacts, works of art, and specimens referred to in the preceding paragraph shall be exempt from duties provided they are to be re-exported within six months following the date of importation or the time period approved of by the Customs Administration. Where goods are not re-exported or re-exported within the allotted time period, the duties or taxies leviable upon them shall be paid by the taxpayer or the guarantor on behalf of the taxpayer.The scope of artifacts, works of art, and specimens referred to in Paragraph 1, the application procedure, the qualifications and conditions of the written guarantor, the extension of the time limit referred to in the preceding paragraph, the removal of guarantee liability, the payment procedure for import duties and other matters shall be prescribed by the central supervisory authority in cooperation with the Ministry of Finance.
中文原文 文化藝術獎助條例第30條
參展或拍賣之文物、藝術品、標本進口時應納之稅款,由納稅義務人以外之國內主辦單位或舉辦參展、拍賣之業者、團體向海關提供書面保證,免繳納稅款保證金放行。
前項文物、藝術品、標本於進口放行之翌日起六個月或海關核准之展延期限內,原貨復運出口者,免繳納稅款;不再復運出口或逾限時,由納稅義務人繳納進口稅款或由提供書面保證者代繳進口稅款。
第一項文物、藝術品、標本之範圍、進口申報程序、書面保證提供者之資格與要件、前項展延復運出口期限之申辦程序、書面保證責任之解除、進口稅款繳納程序及其他應遵行事項之辦法,由中央主管機關會同財政部定之。

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