In view of the prevailing situation of COVID-19 pandemic, BCAS has prescribed several counter-measures. Which one of the following has not been stipulated by the BCAS ?

During the COVID-19 pandemic, the Bureau of Civil Aviation Security (BCAS) issued a Standard Operating Procedure (SOP) to ensure aviation security while minimizing the risk of virus transmission. The guidelines emphasized "contactless" or "minimal contact" screening processes.

• Option A: Airport operators were required to ensure social distancing through floor markers and managed queuing to prevent crowding.
• Option B: Passengers were directed to divest all metallic items into their hand baggage or trays to ensure a clear pass through the Door Frame Metal Detector (DFMD), thereby reducing the need for physical frisking.
• Option D: Sanitization of plastic trays after every use was a mandatory hygiene protocol.
• Option C: This was not stipulated. In fact, 100% pat-down searches were avoided to maintain social distancing. Physical searches were only conducted if the DFMD triggered an alarm or if there was specific suspicion.