Surely even in Thai law once in the van the driver is fully responsible for those that boarded until all passengers depart the van at the drop off point at or near the school and in a safe manner.
Do the schools in Thailand not have class registration in the morning?
If a child is not in attendance at registration the front office should be informed by the teacher so a parent or carer can be contacted to ascertain the reason for absence or the whereabouts of the missing pupil.
As a foreigner I paid cash with a Thai bike licence AND a certificate of residence from immigration. Job done.
However had to take Thai gf along as no one in sales spoke good enough English. Needless to say she wanted it in her name - LMAO.
So how did they pass through the "turn stiles" without the BTS security person stopping them. Obviously not now know allowed to stop non-mask wearers entering the network. However mask wearing still required at Thai domestic airports,