Customs officers and officers of the national police and the national gendarmerie responsible for border policing missions may communicate to each other, on request or spontaneously, all information and documents held or collected in the course of their respective missions relating to border crossings, within the meaning of Regulation (EU) 2016/399 of the European Parliament and of the Council of 9 March 2016 on a Union Code on the rules governing the movement of persons across borders (Schengen Borders Code).