With December 28th, 2023, revised procedures for VFR flights in airspace Classes C and D will become effective, requiring such flights to establish two-way radio communication with the respective ATC unit.
Details regarding these procedures are published in AIC A 20/23:
AIC A 20/23 (austrocontrol.at)If you have any questions, please contact us:
info@austrocontrol.at 
