In einem anderen Forum gefunden:

PRESS RELEASE – 21 June 2017 For immediate release In a joint effort the European Federation of Light, Experimental & Vintage Aircraft (EFLEVA), the Vereniging Vlaamse MotorVliegclubs (VVMV) and the Belgian Aviation Authorities we are pleased to announce that amateur-built and certain historic aircraft registered in European Civil Aviation Conference (ECAC) member states no longer require a permit to over fly Belgian territory for 30 days in a calendar year. A Royal Decré has been published on 21 June 2017 which confirms and details this change. It comes in effect on 1 July.

Gerade rechtzeitig für https://efleva-days.eu/

So geht Europa :-)