Enforcement Rules of the Act on Property-Declaration by Public Servants Article 15

With respect to the time and reason of acquisition or occurrence as prescribed in the first half of Paragraph 3 of Article 5 of the Act, the time and reason of acquisition or occurrence shall be the registered date and reason with the registration agencies (institutions). In the event that no such registration is made, the time and reason of acquisition or occurrence shall be based on the actual time and reason when the acquisition or occurrence takes place.With respect to the declaration of the price of acquisition as prescribed in the second half of Paragraph 3 of Article 5 of the Act, any public servant subject to the Act shall declare the actual transaction price or the original manufacturing price if the property is acquired within five years prior to the day of declaration. In the event that there is no actual transaction price or the original manufacturing price, the price of acquisition shall be based on the current assessed land value of the year of acquisition, the building’s taxable value or the market price.
中文原文 公職人員財產申報法施行細則第15條
本法第五條第三項前段所定取得或發生之時間及原因,以登記機關(構)登記資料之登記日期及登記原因為準;未登記者以事實發生之時間及原因為準。
本法第五條第三項後段所定應申報其取得價額,於申報日前五年內取得者,公職人員應申報實際交易價額或原始製造價額;無實際交易價額或原始製造價額者,以取得年度之土地公告現值、房屋課稅現值或市價為準。

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