23 September 2021. Airports of Thailand (AoT) has revealed that authorities are repurposing the Advance Passenger Processing System (APPS), to check incoming air passengers’ health documentation ahead of their arrival, as the country is set to reopen to tourism starting next month.https://www.pattayamail.com/thailandnews/thailand-ramps-up-health-screening-of-international-arrivals-372910