Act Governing the Choice of Law in Civil Matters Involving Foreign Elements Article 19
Where an agent undertakes a juridical act in the name of the principal with a third person, as between the third person and the agent, the legal effect of the agent’s acting with, in excess of, or without authority is governed by the applicable law as provided in the preceding Article.
中文原文 涉外民事法律適用法第19條
代理人以本人之名義與相對人為法律行為時，在相對人與代理人間，關於代理人依其代理權限、逾越代理權限或無代理權而為法律行為所生之法律效果，依前條所定應適用之法律。