8 May 2022. The O’ Smach international border checkpoint at Cambodia’s province of Oddar Meanchey and Thailand’s province of Surin was reopened. To be able to travel within Thailand, Cambodians need to have a passport, health insurance certificate and valid COVID-19 vaccination card.https://www.khmertimeskh.com/501071067/cambodia-thailand-o-smach-border-checkpoint-reopened/