When an EU/Schengen state next notifies the European Commission of a new reintroduction of internal border controls explicitly targeting arrivals from another named EU/Schengen member state

Clarifications: Resolve using the date of the first new notification entered in the European Commission's NB register that meets all of the following: (1) it is a new notification of reintroduced internal border controls, not a prolongation or renewal of controls already in force; (2) the notification explicitly identifies a specific EU/Schengen member state as the source of the threat, pressure, or risk motivating the controls; and (3) the measure applies to arrivals from that named member state. Do not count general internal border-control notifications justified by broad migration, security, or public-order concerns without naming a specific fellow member state. Do not count Spain's August 2026 counter-measures against Italy, or any renewal/prolongation of those measures. The answer is the notification date in the NB register, not the date controls begin.