National Cultural Affairs Foundations Accounting Standards and Financial Reporting Standards Article 5

The fiscal year of cultural foundations shall be based on the calendar year which begins on January 1 and ends on December 31 each year. The basis of accounting shall be based on an accrual system. The accounting unit shall be NTD and the unit used for financial statements shall be NTD.Where accounts are listed in foreign currencies due to the nature of the business, the cultural foundation shall convert foreign currencies into NTD for calculation.
中文原文 全國性文化事務財團法人會計處理及財務報告編製準則第5條
文化法人會計事務之處理,會計年度採曆年制,自每年一月一日起至十二月三十一日止;會計基礎,採權責發生制;記帳單位為新臺幣「元」;財務報表編製單位為新臺幣「元」。
前項因業務特性,而以外國貨幣計帳者,仍應在財務報表中,將外國貨幣折合新臺幣計算之。

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