According to Joint Circular No. 89/2016/TTLT-BTC-BCT, the subjects, levels and authority of access to National Single Window (NSW) portal are prescribed as follows:

- Organizations and individuals fulfilling administrative procedures: Access NSW for declaration; receiving feedback; receiving results of  one-stop administrative procedures and other responses, and searching for information published in NSW.

- Customs authorities, belonging agencies of Ministry of Industry and Trade: Access to receive information, process and return results;  to receive one-stop administrative procedure dossiers and handling results of other relevant agencies;

- State management agencie: Access to use information from NSW according to clause 2, Article 27 of this Joint Circular.

The process for declaration, information receipt, information exchange and feedback in NSW is provided for as follows:

- According to this Joint Circular, the declarants of information through NSW include: customs declarants; organizations and individuals conducting export, import and transit of goods; and organizations and individuals who implement administrative procedures.

- Declarants must comply with the provisions on the criteria and format of the information declared in accordance with the technical requirements for each one-stop administrative procedure; digital signature; payment of taxes, charges, fees and other payables; ensuring the safety and confidentiality of the implementation of one-stop administrative procedures; storing and providing electronic documents; meeting conditions regarding information technology and technical requirements for the implementation of one-stop administrative procedures.

- The NSW portal receives information 24 hours per day and 7 days  per week. The exchange of information among Ministry of Finance, Ministry of Industry and Trade and the NSW shall comply with the provisions in this Joint Circular.

This Joint Circular also specifies the documents that should be provided by Customs authorities and the Ministry of Industry and Trade for the implementation of administrative procedures through NSW, as well as mechanism for information exchange among relevant agencies.

This Joint Circular becomes effective since August 20, 2016.