As the screening concerns third-country nationals present at the external border without fulfilling entry conditions, third-country nationals disembarked after a search and rescue operation without fulfilling entry conditions, and third-country nationals illegally staying within the territory of Member States, the security checks as part of the screening should be at least of a similar level as the checks performed in respect of third-country nationals who apply beforehand for an authorisation to enter the Union for a short stay, whether they are under a visa obligation or not.