A method and system for tailoring responses from a location-determination system. A location-determination system will receive a position request from a location-based service (such as a PSAP), seeking the location of a wireless communication device, and the location-determination system will provide a position response, indicating the location of the wireless communication device. A rules engine positioned in the communication path between the location-determination system and the location-based service will intercept the position response and will tailor the response in a manner dependent on the identity of the location-based service that sent the request. Advantageously, a wireless service provider can control operation of the rules engine to dictate how to tailor various position responses, without the need to modify operation of the location-determination system.