Sec. 345.076.  AMOUNT OF REFUND CREDIT FOR OTHER CONTRACTS.  The refund credit on a contract to which Section 345.075 does not apply shall be computed in a manner proportionate to the method set out by that section, having due regard for:
(1)  the amount of each installment;  and
(2)  the irregularity of the installment periods.
Acts 1997, 75th Leg., ch. 1008, Sec. 1, eff. Sept. 1, 1997.