If it is shown to the satisfaction of the department, based upon proper records and from any other evidence as the department may require, that liquid fuel, other than fuel mentioned in paragraphs (1), (2), and (3), is used for agricultural equipment that does not operate upon the public highways of the State, the user thereof may obtain a refund of all taxes thereon imposed by this section in excess of 1 cent per gallon. The department shall adopt rules to administer such refunds.
If any user of diesel oil furnishes a certificate, in a form that the department shall prescribe, to the distributor or if the distributor who uses diesel oil signs the certificate, certifying that the diesel oil is for use in operating a motor vehicle or motor vehicles in areas other than upon the public highways of the State, the tax as provided in paragraphs (1) to (4) shall not be applicable. If a certificate is not or cannot be furnished and the diesel oil is in fact for use for operating a motor vehicle or motor vehicles in areas other than upon public highways of the State, the user thereof may obtain a refund of all taxes thereon imposed by the foregoing paragraphs. The department shall adopt rules to administer the refunding of such taxes.
The taxes so paid shall be paid into the state treasury and deposited in special funds or paid over in the same manner as provided in subsection (b) in respect of the tax on diesel oil;
HRS § 243-4