Store and region based pricing rules
Pricing rules, such as coupons, automatic rules, and manual rules have store assignments in the same way that price lists do: all of the rules assigned to a region can also be applied to child regions. The pricing rules created by a store are applicable only to that particular store.
Exclusivity settings can be used on pricing rules to prevent multiple similar pricing rules from being applied to an order. Pricing rules created by a store can be added to or removed from any pricing rule Exclusivity ID; however, stores cannot create new Exclusivity IDs.