Sec. 902.5. (a) A rural transit system is entitled to a refund of tax paid on gasoline used for transporting persons for compensation by means of a motor vehicle or trackless trolley. However, the transporting must be done:
(1) within a service area that is not larger than the rural transit system service area and the counties contiguous to that rural transit system service area; and
(2) under a written contract between the rural transit system and the county providers within the service area that meets the requirements prescribed by the department.
(b) If a refund is not issued within ninety (90) days of filing of the verified statement and all supplemental information required by section 904.1 of this chapter, the department shall pay interest at the rate established by IC 6-8.1-10-1(c) computed from the date of filing of the refund application until a date determined by the administrator that does not precede by more than thirty (30) days the date on which the refund is made.