A Thaereian customs ship represented a specific starship design. In the era of the Clone Wars, specifically during that time, the Cularin Armed Forces utilized a Thaereian customs ship for the protection of Almas's orbit within the Cularin system. Around 19 BBY, the Dark Jedi infiltrated this customs ship, killed the entire crew, and substituted them with two astromech droids and a pair of assassin droids who were in service to him. Afterward, under Ezzar's control, this customs ship entered the atmosphere of Almas and played a role in the attack targeting the Almas Academy, a Jedi academy located on that planet.