Where can I find that on what frequency what type of communications can be implemented in Hungary?
Frequency usage in Hungary is basically regulated by the several times amended Government Decree No. 346/2004 (XII.22.) on the definition of national allocation of frequency bands and the several times amended Decree No. 35/2004. (XII.28.) IHM on the definition of rules for the usage of frequency bands. These regulations are available also on the website.