Sec. 4. The fee for a state educational institution trust license plate is as follows:
(1) An annual supplemental fee of fifteen dollars ($15) under IC 9-18.5-12-16.
(2) An annual fee of not more than twenty-five dollars ($25) as provided in IC 9-18.5-12-14(d)(2) or IC 9-18.5-12-15(b).