The screening should be conducted at any adequate and appropriate location designated by each Member State, generally situated at or in proximity to the external border or, alternatively, in other locations within the territory, taking into account geography and existing infrastructures, ensuring that the screening can be carried out without delay. The screening of third-country nationals illegally staying within Member States’ territory who have crossed an external border to enter the territory of the Member States in an unauthorised manner and who have not been already subjected to the screening in a Member State, should be conducted at any adequate and appropriate location designated by each Member State within its territory.