Administrative Regulations for Equal Access Services of Telecommunications Enterprises Article 15
Unless there are justifiable reasons or other agreements, the selection service providers shall complete the setting within four working days after receiving notice from long-distance or international Voice-based Telecommunications Universal Service enterprises in accordance with subscribers’ application of selection of telecommunication enterprises, and they shall immediately notify the long-distance or international Voice-based Telecommunications Universal Service enterprises in appropriate ways after the work has been completed; if the setting of pre-selection service is adjusted, prior to the adjustment, the former long-distance or international Voice-based Telecommunications Universal Service enterprises shall also be notified.
中文原文 電信事業平等接取服務管理辦法第15條
除有正當理由或另有約定者外，選接服務提供者應於接獲長途或國際通信語音服務電信事業依用戶申請指定電信事業之通知之日起四個工作日內，完成設定作業，並於完成設定時，即刻以適當方式通知長途或國際通信語音服務電信事業，其屬變更指定選接者，並應同時通知變更前之長途或國際通信語音服務電信事業。