Regulations Governing Number Portability Article 20
The Fixed Network Operator and the Mobile Operator shall provide communications services for the called Ported Subscribers by means of database query method since the following time schedule:1. Fixed Network Operators: January 1, 2003.2. Mobile Operators: Since the implementation date of Number Portability under the provisions set forth in Article 13.The database query method as referred to in Paragraph 1 means that access routing information from the Ported Subscriber Database before the communications links are set up.The Originating Network Operator shall negotiate with other Operator to provide communications services for the called Ported Subscribers through the network of the said Operator, the one who accesses routing information from the Ported Subscriber Database before the communications links of that network, which connecting to the network of the receiving Ported Subscriber, may be regarded as in accordance with the requirement of complete the implementation of database query method for providing communications services for the called Ported Subscribers.The Databases prescribed in the preceding three Paragraphs shall not be the Concentrated Databases, except as otherwise in other laws and regulations or in emergency situation that has been granted by the NCC.
中文原文 號碼可攜服務管理辦法第20條
固網經營者及行動經營者自下列時程起，應採資料庫查詢方式提供通信服務至受信攜碼用戶：
一、固網經營者：九十二年一月一日。
二、行動經營者：依第十三條所定應提供號碼可攜服務之日。
第一項資料庫查詢方式，係指發信網路於建立通信鏈路前，先自攜碼用戶資料庫取得路由資訊。
發信網路經營者與其他經營者約定，其發信網路提供通信服務至受信攜碼用戶採經由該其他經營者之網路轉接，且該轉接網路於建立連接至受信攜碼用戶所屬網路之通信鏈路前，先自攜碼用戶資料庫取得路由資訊者，該通信之處理方式視為符合以資料庫查詢方式提供通信服務至受信攜碼用戶。
依前三項規定查詢之資料庫，不得為集中式資料庫。
但法規另有規定或發生緊急狀態經本會核可者，不在此限。
一、固網經營者：九十二年一月一日。
二、行動經營者：依第十三條所定應提供號碼可攜服務之日。
第一項資料庫查詢方式，係指發信網路於建立通信鏈路前，先自攜碼用戶資料庫取得路由資訊。
發信網路經營者與其他經營者約定，其發信網路提供通信服務至受信攜碼用戶採經由該其他經營者之網路轉接，且該轉接網路於建立連接至受信攜碼用戶所屬網路之通信鏈路前，先自攜碼用戶資料庫取得路由資訊者，該通信之處理方式視為符合以資料庫查詢方式提供通信服務至受信攜碼用戶。
依前三項規定查詢之資料庫，不得為集中式資料庫。
但法規另有規定或發生緊急狀態經本會核可者，不在此限。