Verbatim: 'we only allow cats and dogs to be transported, with the exception dangerous breeds (R.D. 287/200 [typo on the page, likely referring to a Spanish royal decree on potentially dangerous animals]): Pit Bull Terrier, Staffordshire Bull Terrier, American Staffodshire Terrier [typo 'Staffodshire' on the page], Rottweiler, Dogo Argentino, Fila Brasileiro, Tosa Inu and Akita Inu.' The banned breed list was mapped to breed_id in data/reference/breeds.json: pit_bull_terrier, staffordshire_bull_terrier, american_staffordshire_terrier, rottweiler, dogo_argentino, fila_brasileiro, tosa_inu, akita (Akita Inu = Japanese Akita). The ban applies to both cabin and hold (the wording doesn't separate by transport mode) — banned_breeds is a single list, not split by cabin/cargo (the schema has no such split). Brachycephalic breeds are NOT banned but require a liability waiver: 'it is not advisable to travel with brachycephalic dogs and cats due to obstructions in their airways, so the passenger must sign a disclaimer of liability in order to be able to fly with them' — an admission condition, not a ban, so brachycephalic_*_banned=false.