Does the muaythai gym needs to be registered with both ministry of turism and sport and ministry of education to meet the standard of DTV even i train as professional?

Does someone have a sample letter for the DTV, for applying with soft power activities? I am training muay thai, but it is hard to explain to my school what I need. I'm the only foreigner that trains here, and there is a bit of a language barrier. The school is accredited by the muay thai association, but this is the first attempt at DTV visa from there. Thanks in advance for your assistance