Credits and deductions

(a) A company shall be allowed to deduct from its gross receipts (for the tax period covered by Form OP 219) an amount which is attributable to its initial sales of petroleum products to another company and which is included in its gross receipts for such tax period, provided — (1) all petroleum products which such other company purchases from the company are purchased exclusively for sale or use without this state, and (2) such other company completes Form OP 219 and submits such form to the company. (b) A company shall be allowed a credit against the tax, provided — (1) the company made the initial sale of a petroleum product to another company, (2) such petroleum product was purchased by such other company for sale or use without this state, (3) the company included in the measure of its tax liability an amount which is attributable to such initial sale to such other company, and (4) such other company completes Form OP 218 and submits such form to the company. (c) Forms. (1) Form OP 218. (2) Form OP 219.