Copyright Act Article 41

Where an economic rights holder makes a submission to a newspaper or magazine, or licenses the public broadcast of the work, it shall be presumed, unless otherwise stipulated, that the economic rights holder has licensed one printing or one public broadcast only, and that said printing or broadcast shall have no effect on other rights belonging to the economic rights holder.
中文原文 著作權法第41條
著作財產權人投稿於新聞紙、雜誌或授權公開播送著作者,除另有約定外,推定僅授與刊載或公開播送一次之權利,對著作財產權人之其他權利不生影響。

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