1. The state treasurer shall be treasurer and custodian of all funds and moneys of the department and shall issue checks upon such funds or moneys in accordance with such rules and regulations as the department shall prescribe.

2. There is hereby established as a special fund, separate and apart from the public moneys of this state, the following:

(1) Supplemental payment fund;

(2) Aid to families with dependent children fund;

(3) Relief fund;

(4) Child welfare service fund;

(5) Administration fund;

(6) Title XIX fund;

(7) Child support enforcement fund.

3. The supplemental payment fund shall consist of moneys appropriated by the state, and such moneys as may be received from the federal government or other sources for the payment of supplemental payments. All checks payable to recipients of supplemental payments shall be drawn on and paid from this fund.

4. The aid to families with dependent children fund shall consist of moneys appropriated by the state, and such moneys as may be received from the federal government or other sources for the payment of aid to families with dependent children. All checks payable for aid to families with dependent children shall be drawn on and paid from this fund.

5. The relief fund shall consist of moneys appropriated by the state, and such moneys as may be received from the federal government or other sources for aid or relief in cases of public calamity. All expenditures for aid or relief in cases of public calamity shall be paid from this fund.

6. The child welfare service fund shall consist of moneys appropriated by the state, and such moneys as may be received from the federal government or other sources for child welfare services, and this fund or any portion of it may be transferred to the administration fund.

7. The administration fund shall consist of moneys appropriated by the state, and moneys received from the federal government to pay the administrative costs of the department in administering the provisions of the law. All checks payable for employees and personal services of representatives of the department shall be drawn on and paid from the administration fund.

8. The Title XIX fund shall consist of moneys appropriated by the state and such moneys as may be received from the federal government or other sources for the payment of medical assistance rendered to eligible recipients pursuant to the Title XIX state plan, and all checks payable on behalf of recipients shall be drawn on and paid from this fund.

9. The child support enforcement fund shall consist of moneys appropriated by the state, and such moneys as may be received from the federal government or other sources including moneys representing assigned support obligations collected on behalf of recipients of public assistance and nonrecipients of public assistance, any fees collected by the department and any incentive payments received from other states. From this fund shall be paid any moneys collected which represent assigned support obligations required by state law or federal law to be returned to the obligee on whose behalf the obligation was collected, incentive payments to political subdivisions of this state or to other states, any reimbursement to the federal government for its respective share of payments for aid to families with dependent children and administrative costs incurred by the department in the administration of the child support enforcement program including purchase of child support enforcement services pursuant to the terms of cooperative agreements entered into with political subdivisions of this state, appropriate courts, law enforcement officials or others. Nothing herein shall prohibit the appropriation of federal funds to defer all administrative costs incurred by the department pursuant to chapter 454 in the event that federal financial participation is extended to include all costs.