Reference:
Update Billing Information Process Model - Page 4 on page 7 for the associated business process diagram.
Description: In CC&B v2.4, a new rate engine is available. The existing rate engine remains available, and either or both rate engine may be used. Setup of the rate engines is done through Master Configuration - Rate Engine Configuration. Rates can be designed to produce the same results using either rate engine. Rates based on the existing rate engine are referred to as Classic rates, while rates based on the new rate engine are referred to as New Style rates.