<h1>Airport security measures: visitor entry banned and mandatory preboarding secondary checks implemented with enhanced surveillance and cargo screening.</h1> The advisory imposes a Visitor Entry Ban to terminal buildings and mandates Secondary Ladder Point Checking for all flights, requiring passenger and hand baggage checks immediately prior to boarding in addition to primary screening. It directs full serviceability of CCTVs, deployment of in flight security officers, full search of aircraft and catering supplies, scrutiny of PNRs and manifests, enhanced cargo and general aviation terminal surveillance, coordination with local police, and heightened vigilance and multiple screening methods for high risk shipments.