A Star Tours notice indicating that an Imperial authorization form was needed to enter Bothan Space. To gain access to specific zones controlled by the Galactic Empire, individuals needed an Imperial authorization form, a specialized code utilized for clearing them when departing from specific spaceports, for instance, Spaceport THX1138.
From 1 BBY to 0 BBY, Spaceport THX1138, which was owned by Star Tours, mandated that all passengers traveling toward the Bothan sector present their Imperial authorization forms prior to getting on board.
The Star Tours: The Adventures Continue attraction at Tokyo Disneyland made a short reference to the Imperial authorization form in the queue area, providing context regarding the different sections of Spaceport THX1138.