I hold a Non Immigration O-A Multiple Entry visa issued in Australia in March 2019 valid until March 2020. I have returned to Australia and will re-enter Thailand in February 2020 for a period of 3 weeks. My questions are... 1) do I need Health Insurance to enter in February, and 2) will I need Health Insurance to enter during the 12 month Extension of Stay period, up to February 2021?