The Program Director shall establish a sliding reimbursement scale to determine a participant's reimbursement rate. The participant's reimbursement rate shall be based on: The participant's adjusted annual gross income; The number of persons dependent on household income including the participant's spouse, and minors younger than 18 years old; and The participant's cost of attendant care services. A participant eligible in the category set forth in Regulation .04B(1) of this chapter shall pay a minimum of 2 percent of the cost of attendant care services, unless the Program Director determines that the minimum copayment causes the participant financial hardship and issues a written waiver of the copayment. A participant eligible in the category set forth in Regulation .04B(2) of this chapter shall pay a minimum of 5 percent of the cost of attendant care services, unless the Program Director determines that the minimum copayment causes the participant financial hardship and issues a written waiver of the copayment.