Commencing July 1, 2006, all regional center vendors who are qualified providers under Title XIX of the federal Social Security Act (42 U.S.C. Sec. 1396 et seq.) and are serving individuals enrolled under the Home- and Community-based Services Waiver program for persons with developmental disabilities, shall ensure that billing information provided to regional centers identifies each individual consumer and, for each consumer, the specific dates of service, location of service, service unit, unit costs, and other information necessary to support billing under the home- and community-based services waiver. Regional centers shall also ensure that their contractual and other billing and payment arrangements with providers require the provision of any information necessary to support billing under the Home- and Community-based Services Waiver program. Resources provided to regional centers, pursuant to the Budget Act of 2006 and following budgets, to implement this provision shall be allocated to the regional centers only until implementation of a statewide electronic data system that collects the billing information necessary to support billing under the Home- and Community-based Services Waiver program.