Enforcement Rules of the Customs Act Article 17

The term "deductive value" referred in to Article 33, Paragraph 3, of the Act shall not include circumstances as specified in Article 29, Paragraph 3, Subparagraph 2, of the Act between the buyer of the greatest aggregate quantity of the first commercial level of the imported goods and the foreign producer or seller of the imported goods.The profit, general expenses and commissions usually paid or agreed to be paid referred to in Article 33, Paragraph 3, Subparagraph 1, of the Act shall be verified on the basis of the generally accepted accounting principles of the Republic of China.
中文原文 關稅法施行細則第17條
本法第三十三條第三項所定國內銷售價格,不包括國內第一手交易階段最大銷售數量之買方與該進口貨物之國外生產或銷售者,有本法第二十九條第三項第二款所列情形之一者在內。
本法第三十三條第三項第一款所定一般利潤、費用或通常支付之佣金,以符合我國一般公認會計原則之資料核定之。

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