Two or more counties may execute an agreement under this chapter to create a joint county indigent defense fund to be used to compensate attorneys appointed to represent indigents. In addition to other requirements of an agreement under this chapter , the agreement shall provide for the amount to be paid by each county based on its population to establish and maintain an appropriate balance in the joint fund, and for a method of repayment if a county withdraws more funds than it has contributed. 83 Acts, ch 123, §36, 209 ; 84 Acts, ch 1067, §10 ; 99 Acts, ch 135, §12 Referred to in §331.424