A. The tax imposed by Sections 500.4 and 500.4B of this title, measured by motor fuel removed by a licensed supplier from a terminal or refinery in this state other than a bulk transfer, shall be precollected and remitted on behalf of the retail consumers to the state by the supplier, as shown in the records of the terminal operator, who removes the taxable gallons.

B. The supplier, and each reseller, shall list the amount of tax as a separate line item on all invoices or billings.

C. All tax to be paid by a supplier with respect to gallons removed on the account of the supplier during a calendar month shall be due and payable on or before the twentieth day of the following month unless such day falls upon a weekend or state or banking holiday in which case the liability would be due the next succeeding business day.

D. A supplier shall remit any late taxes remitted to the supplier by an eligible purchaser and shall timely notify the Commission of any late remittances if that supplier has previously given notice to the Commission of an uncollectible tax amount pursuant to subsection B of Section 500.24 of this title. For the purposes of reporting a payment received on previously claimed uncollectible taxes, any payments made to a supplier on a debt or account shall be applied first proportionally to the gallons sold and the tax thereon, and secondly to interest, service charges, and any other charges.