Airspace Regulation to Operate a Kitepower System
This is a good start. Further approval must include automatic operation and operation without line of sight.
Page 6: low risk (SAIL I and II); medium risk (SAIL III and IV); high risk (SAIL V and VI).
From the Kitepower page:
The Kitepower system is classified as SAIL II, which allows it to be operated at locations all over Europe.