You can associate regions that define the set of geographical areas a resource pool services.
You can also specify the days of week and time of day that the resource pool services a given region as well as specify whether the region is the resource pool's primary region. If a region is not marked as a primary region, it is only considered if all other resource pools that may have been configured with the region marked as a primary region have no available capacity.
To add a region to a resource pool: