"It appears, from a 1942 document ... that Hergé gave publishing rights for the books of The Adventures of Tintin to publisher Casterman, so Moulinsart is not the one to decide who can use material from the books." said the Hague court's ruling.
The Hague court's decision emphasizes that the author of The Adventures of Tintin, Hergé, granted publishing rights for his work to Casterman in a specific year (1942). This means that Moulinsart, the company responsible for the original creation and publication of the books, does not have the authority to control who can use the content.