The Arbitration Law of ROC Article 1

Parties to a dispute arising at present or in the future may enter into an arbitration agreement designating a single arbitrator or an odd number of arbitrators to constitute an arbitral tribunal to determine the dispute.The dispute referred to in the preceding paragraph is limited to those which may be settled in accordance with the law.The arbitration agreement shall be in writing.Written documents, documentary instruments, correspondence, facsimiles, telegrams or any other similar types of communications between the parties evincing prima facie arbitration agreement shall be deemed to establish an arbitration agreement.
中文原文 仲裁法第1條
有關現在或將來之爭議,當事人得訂立仲裁協議,約定由仲裁人一人或單數之數人成立仲裁庭仲裁之。
前項爭議,以依法得和解者為限。
仲裁協議,應以書面為之。
當事人間之文書、證券、信函、電傳、電報或其他類似方式之通訊,足認有仲裁合意者,視為仲裁協議成立。

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