The principal commercial space aboard Deep Space 9 is the Promenade. The physical arrangement places it within the Upper Core assembly, protected by the defensive shield generators above and the shield wall below. The Promenade is divided into three 120degree arcs, each arc is defined by structural reinforcements capable of lockdown using compartment-type doors and force fields. The space is additionally divided into three floors, consisting of Level 5, 6, and 7.

     Level 7 concourse provides a wide range of shops, trading posts, services, entertainment, and food establishments, plus the Bajoran temple. Commercial space is controlled by the Deep Space 9 Merchants Association and is leased by the cubic meter, in addition to partition construction and utilities costs for EPS power, common gas, and fluid supplies, and ODN connections.