Ship Orders and Behaviours can be further refined and curtailed by implementing a wide variety of Blacklists which can restrict ship movements (i.e what sectors it is and is not allowed to cross or enter)as well as ship and station trade (i.e. which factions your ships and stations can trade with). Blacklists can be accessed from the global orders menu and it is possible to create a blacklist for every ship or simply apply one blacklist to all ships.
Applications of blacklists include but are not limited to being able to alter NPC economies by altering their flow or resources or being able to keep your ships in the safer areas of the galaxy by banning them from xenon space.