Enforcement Rules of the Income Basic Tax Act Article 6

With respect to the securities transaction income received by a profit- seeking enterprise from the selling of the shares (stocks) of companies not listed on the Taiwan Stock Exchange (TSE), and/or not traded through Over-the-Counter (“ OTC ” )securities market, and/or the shares (stocks) of emerging companies traded through Over-the-Counter (“ OTC ” )securities market pursuant to Subparagraph 1, Paragraph 1, Article 7 of the Act, if the selling price thereof is obviously lower than the current price of such stocks at the time of transaction, the current price shall be taken as the selling price of such stocks, unless a due cause and the evidentiary document/certificate of such low selling price have been submitted by the said profit-seeking enterprise and have been duly verified by the competent authority concerned.The current price referred to in the preceding paragraph shall be determined by making reference to the transaction prices of such stocks sold at the same time and to a corresponding number of such stocks; but if such reference transaction price is not available, then the net value of each share as calculated based on the net assets value of the issuing company on the transaction day shall be taken as the current price of such stocks.The same period as set forth in the preceding paragraph shall refer to the period of 30 days prior to the transaction date of such stocks; and the corresponding numbers of stocks sold shall be ranging from 50 percent to 150 percent of the total number of such stocks actually sold. When there is more than one reference for current price(s), the average amount of such current price(s) shall be adopted.
中文原文 所得基本稅額條例施行細則第6條
營利事業出售本條例第七條第一項第一款所定之未上市、未上櫃及興櫃公司股票之交易所得,其售價顯較時價為低者,除提出正當理由及證明文據,經查明屬實者外,應按時價核定其售價。
前項所定時價,應參酌該股票同時期相當交易量之成交價格認定之;同時期查無相當交易量之成交價格者,按交易日公司資產淨值核算每股淨值認定之。
前項所定同時期,為該股票交易日之前三十日;所定相當交易量,以該股票交易量百分之五十至百分之一百五十為範圍。
時價資料同時有數筆者,以其平均數認定之。

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