Regulation (EU) 2018/395
In accordance with Article 3, this Subpart establishes the requirements to be met by any operator of balloons, other than the design or production organisations referred to in the second subparagraph of Article 3(1).
ED Decision 2018/004/R
An aerial advertising flight, displaying a logotype or an advertisement on the balloon, should only be considered a commercial operation, when:
(a) especially conducted at a specific time and for an advertising purpose; and
(b) conducted in return for remuneration or other valuable consideration from the principal, with or without the existence of a contract.
ED Decision 2018/004/R
Mixed balloons are operated in accordance with the requirements for hot-air balloons, unless otherwise specified.