According to the King County Decision, what is stipulated regarding costs?

The stipulation regarding costs from the King County Decision indicates that the cost is defined by the selective router. This emphasizes the role of the selective router as a central point in the telecommunications system used for emergency services. The selective router manages the routing of emergency calls, which includes determining associated costs for those services based on how the call is processed and managed through the system.

Utilizing the selective router for cost determination aligns with how emergency service providers structure their operations to ensure efficient communication routing, while also impacting how financial obligations are distributed among various service providers. This highlights the technical infrastructure's significant influence on both service delivery and financial arrangements.

In contrast, other options do not accurately capture the specifics of the King County Decision. The notion of costs being shared equally among providers implies a simplistic division that may not reflect the operational realities dictated by the routing system. Likewise, stating that costs are determined by the federal government overlooks the localized decision-making processes that are involved in managing emergency communication services. Lastly, while population served can be a factor in determining resource allocation, it does not reflect the relationship to the selective router's technical operational role in establishing costs.