Regulations for Arbitration on Labor-Management Disputes Article 4
In case that both parties have agreed in writing to apply for arbitration and one party raises the issue whether this written agreement does exist, the municipal or county (city) competent authorities (here-in-after referred to as the local competent authorities) shall interpret this agreement with the principle of promoting the effectiveness of it.In case that the documents, correspondences, faxes, telegrams or other similar forms of communications between the two parties can prove that they have agreed to arbitrate, it shall be regarded that this agreement does exist
中文原文 勞資爭議仲裁辦法第4條
勞資爭議經雙方當事人以書面同意申請交付仲裁者，一方對書面同意之有無爭執時，直轄市、縣（市）主管機關（以下簡稱地方主管機關）應以利於有效性原則解釋之。
當事人間之文書、信函、電傳、電報或其他類似方式之通訊，足認有仲裁合意者，以有同意仲裁認定之。
當事人間之文書、信函、電傳、電報或其他類似方式之通訊，足認有仲裁合意者，以有同意仲裁認定之。