1. A method, comprising: receiving, at a service design system, accounting parameters of a first service plan, the accounting elements for accounting use of a network service; generating a policy based on the accounting elements, the policy for assisting in the control of accounting the use of the network service by the communications device; translating the policy to instructions; providing the instructions to the communications device, the communications device capable of implementing the policy; and providing information about the policy to a service integrity element capable of monitoring the implementing of the policy by the communications device by determining whether a first accounting measure at the communications device is within a tolerance of a second accounting measure.