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1. Each Member State shall establish a national single window environment for customs and shall be responsible for its development, integration and operation.

2. The national single window environments for customs shall enable the exchange of information and cooperation by electronic means between customs authorities, partner competent authorities and economic operators through EU CSW-CERTEX for the purposes of compliance with, and efficient enforcement of, customs legislation and the Union non-customs formalities listed in the Annex.

3. For the Union non-customs formalities and systems listed in Part A of the Annex, the national single window environments for customs shall provide the following functionalities:

(a) a single communication channel for economic operators, who may use it to fulfil the relevant customs formalities and Union non-customs formalities subject to additional digital cooperation in accordance with Article 12;

(b) quantity management related to the Union non-customs formalities, where applicable; and (c) automatic verification of compliance with the Union non-customs formalities listed in the Annex based on the data received by customs authorities through EU CSW-CERTEX from Union non-customs systems.

4. For each of the Union non-customs formalities and systems listed in Part B of the Annex, if the national single window environment for customs is connected to EU CSW-CERTEX in accordance with Article 5(5), that national single window environment for customs shall provide all of the functionalities listed in paragraph 3 of this Article.

5. The national single window environments for customs may be used as a platform to coordinate controls performed in accordance with Article 47(1) of Regulation (EU) No 952/2013.