Because of Radiation Safety Officer (RSO) is the one who take responsible about radiation techniques, so they must have the license of production and concession for utilizing of nuclear energy and radioactive materials.
Every country in the world has a laws and regulations of using radiation. In Thailand, Royal Thai Government proclaimed the enactment of the Atomic Energy for Peace Act in 1961 to control of using radiation by making a permit. The duty of RSO is look after workers and peoples and do not let them have the effect from using radiation.