This chapter establishes the methodology that the Department shall use to reimburse: Licensed residential alternative living units, residential group homes, day habilitation programs, and vocational programs that provide services to individuals with disabilities after June 30, 1998; Supported employment provided by licensed providers of services to individuals after June 30, 2001; Add-on component services for individuals in these programs; and Supplemental services for individuals in these programs. Services reimbursed under this chapter are funded by Medicaid funds and, in whole or in part, by State general funds. When the reimbursement for a service is based on an established rate under this chapter, the rate is based on the service needs of the individual, an allowance for indirect expenses incurred by providers, and the regional location of the services. The Administration may contract for additional services according to the State procurement laws. This reimbursement system is subject to the Administration's approved budget appropriation. This chapter does not affect any cost settlement or litigation related to funding commenced before July 1, 1998.