Local control zones [LCZ) exist within local STC zones around large structures: colony cylinders, stations, autofacs. cargo yards and shipyards. The typical local control is a sphere 50 kilometers in diameter around the structure. With the increased traffic common to the busiest spaceports, the LCZ is sometimes increased to a larger sphere 100 kilometers in diameter. Inhabited moons typically have a local control zone equal to the moon’s radius from horizon to horizon, centered on the habitat. To enter the local control zone, vessels must contact the LCZ control center for permission, approach vectors and docking assignments. If a vessel enters the LCZ without permission, it could be assigned a fine [up to 50,000 credits) or suspension of docking privileges.