Taxability of liquid fuel delivered into purchaser's tanks—(1) Fuel supply tanks. (i) The sale of diesel fuel to an owner, lessee, or other operator of a diesel-powered highway vehicle, or of special motor fuel to an owner, lessee, or other operator of a motor vehicle or motorboat, or of fuel to an owner, lessee, or other operator of an aircraft used in noncommercial aviation is considered a taxable sale of the liquid fuel if the liquid fuel is delivered by the seller into the fuel supply tank of the vehicle, motorboat, or aircraft. For purpose of this paragraph (a), liquid fuel sold at a location unattended by the seller (such as under a cardlock or meter system) on or after January 2, 1986, is considered to be delivered into the fuel supply tank by the seller except as provided in paragraph (a)(1)(ii) of this section. In this regard, see section 6427(a) for credit or refund of tax if liquid fuel acquired in a transaction subject to tax is used in a nontaxable use.

If the seller maintains special devices at the unattended location to account accurately for sales of liquid fuel for nontaxable uses (such as assigning a separate “nontaxable” meter or, in a cardlock system, issuing a special “nontaxable” card to a customer who regularly purchases fuel for nontaxable uses), then such sales of liquid fuel shall be considered nontaxable. The seller must maintain sufficient records of such nontaxable sales and include in these records the name of the purchaser, the date of the purchase, and the quantity of fuel purchased in each sale.

Bulk tanks. The sale of diesel fuel to an owner, lessee, or other operator of a diesel-powered highway vehicle, or of special motor fuel to an owner, lessee, or other operator of a motor vehicle or motorboat, or of fuel to an owner, lessee, or other operator of an aircraft used in noncommercial aviation is considered a taxable sale of the liquid fuel if—

The liquid fuel is delivered by the seller into a bulk supply tank (or other container) that is not the fuel supply tank of a vehicle, motorboat, or aircraft; and

The purchaser furnishes a written statement to the seller before or at the time of the sale stating that the entire quantity of the liquid fuel covered by the sale is for a taxable purpose as a fuel in such a vehicle, motorboat, or aircraft.

Sales for resale and to consignees. (1) A sale to a dealer for resale is not subject to tax even if it is known at the time of the sale that the liquid fuel will be resold by the dealer for use as a fuel in a diesel-powered highway vehicle, motor vehicle, motorboat, or aircraft.

The tax is payable by the person who makes the taxable sale. If a taxable liquid fuel is consigned to a person for sale and the consignor retains ownership in the liquid fuel until it is disposed of by the consignee, the consignor is the person liable for the tax when a taxable sale of the liquid fuel is made by the consignee. If the consignor transfers ownership in the taxable liquid fuel to the consignee before sale of the liquid fuel by the consignee, the consignee is the person liable for the tax upon a subsequent taxable sale of the liquid. However, if ownership of the liquid fuel is transferred back to the consignor or to another person before a taxable sale is made, as described in paragraph (a) of this section, and thereafter a taxable sale of the liquid fuel is made by such person or by another person acting as the person's agent, such person is liable for the tax. See paragraph (d) of § 48.4041-8 for definition of the term “taxable liquid fuel.”