1. For communications outside this exchange area , trunks were installed between exchanges. 2. Howabout can we agree on a common workfile exchange area ? 3. The Unit used the communications / exchange area which was improved along with the plotting area. 4. The rules state that substitution must occur within the designated exchange area in front of the players'bench. 5. Commercial and trade exchange areas in Santa Maria are considered as a " Central Business District ". 6. The ZIP Code for Mount Signal is 92231 and the area is in Calexico's telephone exchange area . 7. Substitution must occur within the designated exchange area in front of the players bench in order to be legal. 8. The Warsaw School of Economics cooperates with around 200 higher education institutions around the world within student and staff exchange areas . 9. Substitution must occur within the designated exchange area ( often called " the box " ) in order to be legal. 10. However, the electoral ward covers no less than three local exchange areas ( all of which lie within the Hillsborough'exchange ( 9268xxxx ).