A provider shall enroll an individual or couple as subsidized participants if: The individual or couple has been determined to be eligible to receive services according to the requirements of Regulation .21 of this chapter and to receive a subsidy according to the requirements of Regulation .23 of this chapter; and State funds are available to pay the subsidy. If an individual or couple is enrolled to receive a subsidy, the provider shall: Determine the amount of the individual's or couple's subsidy on a form provided by the Department; and Annually, or more frequently if the individual or couple has a significant change in their finances, redetermine: The continued eligibility to receive a subsidy; and The amount of the subsidy.