But if you search the web and find that according to the law that has been on the books for many years, Thailand has authorized visitors to rent cars using there country license as long as they meet the requirements agreed on between the counties.
To drive or lease a car in Thailand as a tourist or visitor it is necessary to have either a Thai driving licence or a valid foreign driving licence with a photograph. The foreign licence must either be in English, or be accompanied by an official translation into English or Thai. The licence needs to have been issued by a country that has a treaty with the Thai government allowing the mutual acceptance of driving licences. Most countries, including Australia, Canada, New Zealand, the UK and the USA have this agreement with Thailand under the 1949 Geneva Convention on Road Traffic or the 1968 Vienna Convention on Road Traffic. Those in doubt should contact their embassy/consulate for advice.