As used in these rules, the following definitions apply:

(1) "Aviation gasoline" means all of the various grades of aviation gasoline as defined in American Society for Testing and Materials (ASTM) D 910-70.

(2) "Middle distillate" means any derivative of petroleum, including kerosene, home heating oil, range oil, stove oil, and diesel fuel, which has a fifty percent boiling point in the ASTM D86 standard distillation test falling between 371 degrees and 700 degrees F. "Middle distillate" does not include naptha-based jet fuel, heavy fuel oils grades #4,5, and 6, intermediate fuel oils which are blends containing #6 oil, and all specialty items such as solvents, lubricants, waxes, and process oil.

(3) "Motor gasoline" means a mixture of volatile hydrocarbons, suitable for operation of an internal combustion engine, whose major components are hydrocarbons with boiling points ranging from 140 degrees to 390 degrees F. and whose source is distillation of petroleum and cracking, polymerization, and other chemical reactions by which naturally occurring petroleum hydrocarbons are converted to those that have superior fuel propertieS

(4) "Person" is defined in 90-4-302, MCA.

(5) "Retailer" means any individual, firm, partnership, association, trustee or corporation, owning, leasing, renting, managing or operating a service station, truck stop, or other facility offering for sale, selling, or otherwise dispensing petroleum products to the general public.

(6) "Wholesale purchaser - reseller" means any firm which purchases, receives through transfer, or otherwise obtains (as by consignment) product and resells or otherwise transfers it to other purchasers without substantially changing its form.