Ind. Code § 6-2.5-5-27
(b) Except as provided in subsection (c), a transaction involving a natural gas product (as defined by IC 6-6-2.5-16.5 ) acquired:
(2) to fuel a motor vehicle used in providing public transportation for persons or property;
is not exempt from the state gross retail tax.
(c) Subsection (b) does not apply to transactions involving a natural gas product purchased by a public transportation corporation to fuel a motor vehicle used to provide public transportation for persons.
As added by Acts 1980, P.L.52, SEC.1. Amended by P.L.277-2013, SEC.4; P.L.226-2014(ts), SEC.1.