Prison Act Article 67

A prison may not limit or deny inmates visitors or correspondence, except where it is otherwise stipulated by law or where the inmate voluntarily refuses a visitor or correspondence.A prison, based on an inmate’s request, shall assist the inmate in receiving and communicating with diplomatic or consular personnel of the inmate’s country or region or persons who can represent the inmate’s country or region.
中文原文 監獄行刑法第67條
受刑人之接見或通信對象,除法規另有規定或依受刑人意願拒絕外,監獄不得限制或禁止。
監獄依受刑人之請求,應協助其與所屬國或地區之外交、領事人員或可代表其國家或地區之人員接見及通信。

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