Regulation (EU) 2020/357
For the purpose of this Annex, balloons shall be categorised in the following classes and groups:
“hot-air balloon” class:
group A: envelope capacity up to 3 400 m³ (120 069 ft³);
group B: envelope capacity between 3 401 m³ (120 070 ft³) and 6 000 m³ (211 888 ft³);
group C: envelope capacity between 6 001 m³ (211 889 ft³) and 10 500 m³ (370 804 ft³);
group D: envelope capacity of more than 10 500 m³ (370 804 ft³);
“gas balloon” class;
“mixed balloon” class;
“hot-air airship” class.
→ BFCL.015