Copyright Act Article 34

Economic rights for photographic works, audiovisual works, sound recordings, and performances endure for fifty years after the public release of the work.The proviso of the preceding article shall apply mutatis mutandis to the preceding paragraph.
中文原文 著作權法第34條
攝影、視聽、錄音及表演之著作財產權存續至著作公開發表後五十年。
前條但書規定,於前項準用之。

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