Rapid development of aviation transport over the past few years and the increasing amount of consignments drawing extra resources towards state controlling institutions is the cause of necessity to make significant changes to legislation of several states. Initially state institution surveillance was directed to the valuation of aircrafts and physical condition of aircraft equipment therefore due to the legislation deficiencies inspectors could be very flexible regarding interpretation and freedom of action. Aircrafts and their equipment becoming more and more complicated, as well as growing number and size of businesses involved in aviation transport (e.g. airlines, airports, air traffic control companies etc.) was the reason state institutions were practically unable to continue full surveillance of all companies involved in aviation transport. Solution was found in mutual breakdown of functions and responsibilities among institutions and aviation companies, resulting in fact that institutions are still responsible for development of regulations making foundation for operations safety and overall supervision realization.