The Fixed Network Operators and the Mobile Operators shall manage their Ported Subscriber Databases in accordance with the following requirements:
1. Ensure and periodically check data accuracy, security and normal operational function of the Ported Subscriber Database.
2. Ensure and periodically check the normal operation of function and equipment required for the exchange of Ported Subscriber information.
3. Establish complete data backup and preparatory rescue measures.
4. Establish and preserve for at least six months historical records of data updates.
5. Perform the testing for data exchange of the Ported Subscriber Database upon the request of other Operators who have set up Ported Subscriber Databases and Type II Telecommunications Enterprises before the Concentrated Databases begin to operate.
The management of the Ported Subscriber Databases of the Fixed Network Operators and the Operators outside of the Mobile Operators and Type II Telecommunications Enterprises deployed Ported Subscriber databases shall apply to the stipulations of the preceding Paragraph.

Except as otherwise prescribed in Paragraph 3 of Article 20, the Fixed Network Operator and the Mobile Operator shall complete the deployment of duplicate Ported Subscriber Database equipment and any other equipment necessary for exchanging Ported Subscriber information prior to the provision of Databases query.

The Ported Subscriber Database equipment as referred to in the preceding Paragraph shall be able to perform the function of exchanging Ported Subscriber information based on the mode and interface of information exchange set forth in Article 25 or Item 6, Paragraph 1 of Article 31.